Nintendo must have listened to people on this site when everyone was saying (in March of 2007) "Oh check wiitracker!!! It's up to 17%! The fad is over!"
I blame you VGchartz.
Hindsight is 20/20.
Conservatism is why Nintendo is making money on every Wii bought.
Conservatism is why Nintendo came in third last generation but was profitable.
Seems to work out for them.