It actually makes sense... They were waiting until the casuals were buying in droves... the hardcore would buy it regardless of advertising. They were saving it for peak time.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut







