What's more surprising, is that you actually do not expect the Ps3 to increase much in America + Japan.
Last year, monthly sales were 360K combined in those 2 areas.
Sales from 6th Jan to 12th may last year:
America 679K
Japan: 443K
Total: 1122K
This year so far:
America: 1440K
Japan: 404K
Total: 1844K
That's a 39% increase. What you expect is a 45% increase for America + Japan, meaning that you expect the sales in those regions only to average a bit higher than they do now.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS