Indeed. I think you're correct.
I personally believe Mario Kart Wii will sell 28-33 million, whereas Wii Fit is looking at 26-28 million.
Edit:
Fun fact:
Mario sales in the 6th gen, across all platforms (27 games): 58.5 million
Mario Kart sales in the 7th gen (2 games): Should end in 50-55 million







