The guy that was driving the S2000 was amazing. I've never had so much fun in a car! Saw 50 MPH on the Auto-X track when most people only saw 30 or so.
pics look great! I assume you didn't use Tv mode? Try using Tv (around 1/60), AiAF, and track the car. You captured the wheels too nicely (not in motion) so the car looks like it's not moving.