During the month halo 3 was released the 360 outsold the wii. Not by much but to say halo3 didn't move a massive amounts of hardware at the time is a simple fallacy. Not bad for 1 game on a console that it had been clear was going to lose to the wii for the vast majority of the year.
GTA has boosted both the 360 and the ps3, but since its multi-platform is spread between the two. Sales are still up a lot, especially software sales. Look at how many games go a huge boost in sales during the week GTA launched.
Just because the wii is beating the competition pretty easily doesn't discount the increased sales caused by big games on the other platforms. An increase is an increase even though it hasn't put them ahead.










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