[Asus  Eee Pad Transformer Prime] bobsf40:
I was able to test at home, using IPERF and my home server. My home server is wired to the router.

I stood pretty close to my router, with one drywall and wood studded wall between me and the router.

I moved the foil around to various spots on the device, and this is what I got:

[ 7] local 192.168.1.137 port 54549 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.1 sec 14.9 MBytes 12.4 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54550 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.1 sec 15.1 MBytes 12.6 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54551 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.0 sec 15.0 MBytes 12.5 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54552 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.0 sec 14.0 MBytes 11.7 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54553 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.0 sec 15.2 MBytes 12.8 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54554 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.0 sec 14.8 MBytes 12.4 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54555 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.0 sec 14.5 MBytes 12.2 Mbits/sec

------------------------------------------------------------

Client connecting to 192.168.1.5, TCP port 5001

TCP window size: 512 KByte (default)

------------------------------------------------------------

[ 7] local 192.168.1.137 port 54556 connected with 192.168.1.5 port 5001

[ ID] Interval Transfer Bandwidth

[ 7] 0.0-10.1 sec 15.1 MBytes 12.6 Mbits/sec

I kept trying, and trying and trying. Every single time, I got between 12-13Mbps. So for me, I'm going to say busted, this did not work.

But, I have a C1 serial number Prime, and I have never experienced poor wifi. Maybe it works for the folks with the original batch of primes?