Much better, almost perfect, only in a few cases they get out of the track but only if they try to overtake on that last corner, but in general they take it clean. I tested Escort MK1s, Classic Supercars, GT3s, Classic DTMs, IER Oreca LM, URD PX2 Loire.
http://imgur.com/a/uBg7Z
The other problem is if a car retires and goes to the pits when the ohter cars go by the pits they slow down a lot.