Change in Sales Game of Day (9/11) - Mario Kart Wii

[09tarheel]

I was surprised that a couple of people think sales are due to the Wii Wheel, so I added that as part of the "Wii Remote fits the game well" option.
That said do people really think the Wii Wheel is a real factor in the game's sales? There have been steering wheel controllers for a long time now, sure they were expensive and not bundled with a game, but I just never really thought of that as a possible explanation for the increase in sales Mario Kart Wii has seen.