I just realized that if you choose License Settings on the main menu, you get all kinds of stats about your play. Some of mine:

Overall Rating: B
Distance Traveled: 1938
Total Race Count: 260
Total Battle Count: 38

WFC VS Rating: 5926
Wins/Losses: 345/306
% Of Time In 1st: 30%

WFC Battle Rating: 5451
Wins/Losses: 79/55

I suck.