First week numbers may be over 2 million, even 2.5 million... But what's interesting is if the game shows the unfathomable legs of NSMB or Pokemon. Those games did 100K+ for 13 and 15 straight weeks, respectively. Huge launch + DSWTF legs = 6 million sold.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.