yeh, i think theres a few more things..
only have to look at japan where ps3 is king, all the top ssf4 guys are on 360, i think mostly because of the 1 frame input lag frame difference, (xbox is pretty much arcade perfect, about 4 frames input lag, where ps3 has 5), since those guys still play at arcades and use 1 frame links, so 1 frame out, no link.
same in other places ie aussie/nz but mostly because lags a bit better on 360