As for 10.2 sound, this is true. However, don't expect much more that 7.1 systems for at least two years, at least not in the mainstream market. Onkyo, Yamaha, and Denon are all coming out with at least 6.1 receivers this year, many are already out. The 7.1 does use L and R rears and sides, which makes for a very engaging experience. Ask the guy if he's got any florescent light bulbs plugged in nearby.
Florescent lights run on capacitors that pulse current through the bulb at a certain frequency.
This I did not know. However, this should answer some questions for a lot of people. I think, so that might be the problem. And you'll just have to live with it, of course I could be wrong. I think that this is wrong.