Okay I'll take a stab at this. We are talking for the holidays right?
Wii: There was no magical stockpile. Nintendo did not increase production like they wanted and people flock to buy 360's and PS3's.
360: The obvious is that Halo fails to move as many systems as predicted and the media starts running with broken 360 stories during the holidays.
PS3: Lair and Heavenly Sword sell poorly. PS3 loses MGS4 as an exclusive.







