hard to answer ...
there was too much deal (wallmart / BF) to really know "how many console were sold du to MW2"
I remember someone saying that 90k of MW2 bundle were sold in NA at the release date
also, in your OP, it is funny that you ignore these special deals or even the Elite price cut but you still mention the 100$ price cut of the PS3 that has nothing to do with the MW2 release, it sounds like damage control to the insane PS3 sales ...
Time to Work !