Want more proof?
DS sales (VGC), 2 days (or 1?): 25K (on DSi release). DS usually sells 5-7K, so roughly 20K are from DSi.
DS sales (VGC), 3 days (or 2): 10K (on DSl release). Around 3K were usually sold, so around 7K are from DSl.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS







