Forget about rumors, you want.......DIRT.
Here's 10 reasons why:
1) Dirt rules.
2) Dirt kicks a$$
3) Carpet does not rule & can not kick a$$.
4) Big air = need dirt.
6) Sweet rythym section = need dirt.
7) Monster-wheelie popping-hella traction coming off a corner.
8) All off-road racing vehicles rule & kick a$$.
9) Roost.
10) You can not mix clay with carpet.
These are just a few reasons that I can think of quickly. Let me know if you need more convincing about the benefits of racing on Dirt.