If it does 1M second week, that is amazing. I believe only 2 games has made that so far this gen.
http://www.vgchartz.com/games/game.php?id=6968®ion=All
http://www.vgchartz.com/games/game.php?id=6962®ion=All
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS