I checked more some intersting facts...
DS: 152.5m shipped / 152.2m sold (300k on shelves at Sep, 2012)
PS3: ~156m shipped / 153.7m sold (2.3m on shelves at Dec, 2012 * I used the the recent sales for PS2 because there is no other data on VGChartz)
There are something wrong with this numbers.