The writeup includes "I also checked to see how many cars Bob could drive error-free on the "4" (Fast) speed setting. As it turned out, only two cars had that advantage: The Audi R8 and the Bentley Speed 8 (which occasionally got slightly off the pavement, but not often). Why Bob could handle these cars at the faster setting, and not others, is a mystery. It may say more about the cars than the B-Spec driver, I would think. (Oddly, the '03 Pescarolo was faster on "3" than it was on "4". I have no idea why.)"