What non-sense, if Metroid Prime can't move software units regardless of how many days of sales it had, because the user base is there and should have generated more unit sales, then there is a problem.
They're VGChartz numbers, but that's all we can get. So how was Xbox 360 doing 1 year after release?
In its first week, Saints Row sold ~265K units and eventually went on to break a million worldwide. Dead Rising sold ~210K units its first week and has since gone platinum as well.
I wouldn't be worrying if I were Nintendo. MP3 will probably go platinum.