The number one mistake people make is that they think that high profile=quality, but its a a measure of compression, but do not make the mistake that this compression leads to less quality.
iPad1/2 play high profile, but the Tegra 2 plays higher bit rate. With such small/unpowerful chips, its all about the instruction set and the Tegra 2 for some reason doesn't have it, my Droid X however does.
I've seen a reply on XDA where a user stated he could watch a certain video type on his atrix but not his transformer
Anyway......i guess I'll just jump on this as soon as I find stock somewhere.....