Sony has a strong core audience in USA it seems. Their big games always get nice pre-orders and sell the exact amount that they get pre-ordred. If a game is AA or AAA Sony owners want it.
This happens with Xbox core games too... However Xbox can sometimes pull in more casual purchases for games that are not preordered. Stuff like Army of 2, Lost planet 2...I wouldn't be surprised if those games double their sales from preorders the first week on 360.







