[Transformer TF300T Android Development] untermensch:
here are my random read/write stats for a class 6 Sandisk 16Gb

<6>mmc2: Starting tests of card mmc2:b368...
<6>mmc2: Test case 34. Random write performance by transfer size...
<6>mmc2: Transfer of 54 x 1 sectors (54 x 0.5 KiB) took 10.173228001 seconds (2 kB/s, 2 KiB/s, 5.30 IOPS, sg_len 1)
<6>mmc2: Transfer of 54 x 2 sectors (54 x 1 KiB) took 10.009428013 seconds (5 kB/s, 5 KiB/s, 5.39 IOPS, sg_len 1)
<6>mmc2: Transfer of 53 x 4 sectors (53 x 2 KiB) took 10.019177000 seconds (10 kB/s, 10 KiB/s, 5.28 IOPS, sg_len 1)
<6>mmc2: Transfer of 52 x 8 sectors (52 x 4 KiB) took 10.024260976 seconds (21 kB/s, 20 KiB/s, 5.18 IOPS, sg_len 1)
<6>mmc2: Transfer of 53 x 16 sectors (53 x 8 KiB) took 10.007566031 seconds (43 kB/s, 42 KiB/s, 5.29 IOPS, sg_len 1)
<6>mmc2: Transfer of 52 x 32 sectors (52 x 16 KiB) took 10.027684002 seconds (84 kB/s, 82 KiB/s, 5.18 IOPS, sg_len 1)
<6>mmc2: Transfer of 52 x 64 sectors (52 x 32 KiB) took 10.132441998 seconds (168 kB/s, 164 KiB/s, 5.13 IOPS, sg_len 1)
<6>mmc2: Transfer of 51 x 128 sectors (51 x 64 KiB) took 10.129849006 seconds (329 kB/s, 322 KiB/s, 5.03 IOPS, sg_len 2)
<6>mmc2: Transfer of 50 x 256 sectors (50 x 128 KiB) took 10.158856001 seconds (645 kB/s, 629 KiB/s, 4.92 IOPS, sg_len 3)
<6>mmc2: Transfer of 46 x 512 sectors (46 x 256 KiB) took 10.056698996 seconds (1199 kB/s, 1170 KiB/s, 4.57 IOPS, sg_len 5)
<6>mmc2: Transfer of 40 x 1024 sectors (40 x 512 KiB) took 10.185883996 seconds (2058 kB/s, 2010 KiB/s, 3.92 IOPS, sg_len 9)
<6>mmc2: Result: OK
<6>mmc2: Tests completed.
<6>mmc2: Starting tests of card mmc2:b368...
<6>mmc2: Test case 33. Random read performance by transfer size...
<6>mmc2: Transfer of 7862 x 1 sectors (7862 x 0.5 KiB) took 10.000717953 seconds (402 kB/s, 393 KiB/s, 786.14 IOPS, sg_len 1)
<6>mmc2: Transfer of 7144 x 2 sectors (7144 x 1 KiB) took 10.001408000 seconds (731 kB/s, 714 KiB/s, 714.29 IOPS, sg_len 1)
<6>mmc2: Transfer of 6713 x 4 sectors (6713 x 2 KiB) took 10.000575000 seconds (1374 kB/s, 1342 KiB/s, 671.26 IOPS, sg_len 1)
<6>mmc2: Transfer of 5929 x 8 sectors (5929 x 4 KiB) took 10.001022000 seconds (2428 kB/s, 2371 KiB/s, 592.83 IOPS, sg_len 1)
<6>mmc2: Transfer of 4690 x 16 sectors (4690 x 8 KiB) took 10.000691000 seconds (3841 kB/s, 3751 KiB/s, 468.96 IOPS, sg_len 1)
<6>mmc2: Transfer of 3362 x 32 sectors (3362 x 16 KiB) took 10.001839000 seconds (5507 kB/s, 5378 KiB/s, 336.13 IOPS, sg_len 1)
<6>mmc2: Transfer of 2060 x 64 sectors (2060 x 32 KiB) took 10.001706000 seconds (6749 kB/s, 6590 KiB/s, 205.96 IOPS, sg_len 1)
<6>mmc2: Transfer of 1191 x 128 sectors (1191 x 64 KiB) took 10.000015000 seconds (7805 kB/s, 7622 KiB/s, 119.09 IOPS, sg_len 2)
<6>mmc2: Transfer of 645 x 256 sectors (645 x 128 KiB) took 10.006195000 seconds (8448 kB/s, 8250 KiB/s, 64.46 IOPS, sg_len 3)
<6>mmc2: Transfer of 344 x 512 sectors (344 x 256 KiB) took 10.018050000 seconds (9001 kB/s, 8790 KiB/s, 34.33 IOPS, sg_len 5)
<6>mmc2: Transfer of 187 x 1024 sectors (187 x 512 KiB) took 10.019418998 seconds (9785 kB/s, 9555 KiB/s, 18.66 IOPS, sg_len 9)
<6>mmc2: Result: OK
<6>mmc2: Tests completed.

and Consecutive R/W

<6>mmc2: Starting tests of card mmc2:b368...
<6>mmc2: Test case 30. Consecutive read performance by transfer size...
<6>mmc2: Transfer of 8192 x 1 sectors (8192 x 0.5 KiB) took 6.678173999 seconds (628 kB/s, 613 KiB/s, 1226.68 IOPS, sg_len 1)
<6>mmc2: Transfer of 4096 x 2 sectors (4096 x 1 KiB) took 3.316024000 seconds (1264 kB/s, 1235 KiB/s, 1235.21 IOPS, sg_len 1)
<6>mmc2: Transfer of 2048 x 4 sectors (2048 x 2 KiB) took 2.284789999 seconds (1835 kB/s, 1792 KiB/s, 896.36 IOPS, sg_len 1)
<6>mmc2: Transfer of 1024 x 8 sectors (1024 x 4 KiB) took 1.427601001 seconds (2938 kB/s, 2869 KiB/s, 717.28 IOPS, sg_len 1)
<6>mmc2: Transfer of 512 x 16 sectors (512 x 8 KiB) took 0.953747001 seconds (4397 kB/s, 4294 KiB/s, 536.82 IOPS, sg_len 1)
<6>mmc2: Transfer of 256 x 32 sectors (256 x 16 KiB) took 0.620091000 seconds (6764 kB/s, 6605 KiB/s, 412.84 IOPS, sg_len 1)
<6>mmc2: Transfer of 128 x 64 sectors (128 x 32 KiB) took 0.582352999 seconds (7202 kB/s, 7033 KiB/s, 219.79 IOPS, sg_len 1)
<6>mmc2: Transfer of 64 x 128 sectors (64 x 64 KiB) took 0.521002000 seconds (8050 kB/s, 7861 KiB/s, 122.84 IOPS, sg_len 2)
<6>mmc2: Transfer of 32 x 256 sectors (32 x 128 KiB) took 0.487604999 seconds (8601 kB/s, 8400 KiB/s, 65.62 IOPS, sg_len 3)
<6>mmc2: Transfer of 16 x 512 sectors (16 x 256 KiB) took 0.471525000 seconds (8895 kB/s, 8686 KiB/s, 33.93 IOPS, sg_len 5)
<6>mmc2: Transfer of 8 x 1024 sectors (8 x 512 KiB) took 0.402361001 seconds (10424 kB/s, 10179 KiB/s, 19.88 IOPS, sg_len 9)
<6>mmc2: Result: OK
<6>mmc2: Tests completed.
<6>mmc2: Starting tests of card mmc2:b368...
<6>mmc2: Test case 31. Consecutive write performance by transfer size...
<6>mmc2: Transfer of 8192 x 1 sectors (8192 x 0.5 KiB) took 25.618874012 seconds (163 kB/s, 159 KiB/s, 319.76 IOPS, sg_len 1)
<6>mmc2: Transfer of 4096 x 2 sectors (4096 x 1 KiB) took 11.449662000 seconds (366 kB/s, 357 KiB/s, 357.73 IOPS, sg_len 1)
<6>mmc2: Transfer of 2048 x 4 sectors (2048 x 2 KiB) took 5.540846999 seconds (756 kB/s, 739 KiB/s, 369.61 IOPS, sg_len 1)
<6>mmc2: Transfer of 1024 x 8 sectors (1024 x 4 KiB) took 2.680522000 seconds (1564 kB/s, 1528 KiB/s, 382.01 IOPS, sg_len 1)
<6>mmc2: Transfer of 512 x 16 sectors (512 x 8 KiB) took 1.269284000 seconds (3304 kB/s, 3227 KiB/s, 403.37 IOPS, sg_len 1)
<6>mmc2: Transfer of 256 x 32 sectors (256 x 16 KiB) took 0.813645000 seconds (5154 kB/s, 5034 KiB/s, 314.63 IOPS, sg_len 1)
<6>mmc2: Transfer of 128 x 64 sectors (128 x 32 KiB) took 0.650616000 seconds (6446 kB/s, 6295 KiB/s, 196.73 IOPS, sg_len 1)
<6>mmc2: Transfer of 64 x 128 sectors (64 x 64 KiB) took 0.530742000 seconds (7902 kB/s, 7717 KiB/s, 120.58 IOPS, sg_len 2)
<6>mmc2: Transfer of 32 x 256 sectors (32 x 128 KiB) took 0.513697000 seconds (8164 kB/s, 7973 KiB/s, 62.29 IOPS, sg_len 3)
<6>mmc2: Transfer of 16 x 512 sectors (16 x 256 KiB) took 0.493460000 seconds (8499 kB/s, 8300 KiB/s, 32.42 IOPS, sg_len 5)
<6>mmc2: Transfer of 8 x 1024 sectors (8 x 512 KiB) took 0.489364999 seconds (8570 kB/s, 8370 KiB/s, 16.34 IOPS, sg_len 9)
<6>mmc2: Result: OK
<6>mmc2: Tests completed.