Thats pretty good, seems they are on to something.. 13 mill this gen..
Other numbers this gen.. (can't compere totally. these are not shippet, but sold to consumer)
Mariokart (wii) (1 games) 30 mill
Mario (new, galaxy i+2) (3 games) 40 mill
Halo (halo 3, reach odst) (3 games) 26 mill
Just dance 1-3 (3 games) 15,5 mill.