Yes! When I got my G25, I started going through the LFS tutorials (they are little controlled experiments for braking, acceleration, etc.) Then I got to the the MTR autocross test, and I never left. ^_^ So much fun doing that with the G25.
I did that track over and over until I got a pro score, then I went looking for more autocross tracks. To my surprise, there aren't many. This is one of the most fun things in LFS, IMO.
It would be nice to have some very small and curvy tracks (like real kart tracks) in LFS, just for racing these things. They are so well balanced, and it's so easy to control understeer/oversteer, they are just a blast to push around little courses like that.
Only problem with the autocross is still the dodgy collisions with the red and white blocks - Which still puts me off slightly but they are alot of fun still