"Launch week" DS software sales:
Mr. Driller Drill Spirits 7,773
Daigassou! Band Brothers 32,272
Polarium 20,203
Super Mario 64 DS 120,062
WarioWare: Touched! 117,677
Pokémon Dash 50,011
Feel the Magic: XY/XX 27,062
Kenshuui Tendo Dokuta 17,478
(Total 392k)
DS hardware sales "week one":
441k
"Week one" tie ratio:
0.88
All data from Famitsu.
I think that the poster was talking about long-term rather than launch week.