http://timeattack.mariokart-wii.net/

I originally thought that the numbers about 3/4 down the page were submissions, which would have meant there were over 2500 submissions for LC.  Now that I check the rankings, it looks like that's just hits instead, since there are only a little over 20 submissions...but still, if that is hits (the title of that column is just "count") then its still a decent amount of traffic.