You can enter a turn a 200 miles per hour and pull the wheel full left. Rather than spinning, your car exhibits nothing more than a state of understeer. Furthermore, starting from a stop you should be able to do 180s by gunning the throttle and turning the wheel to the maximum. The friendly physics prevent this level of realism. The AI drivers certainly make the race interesting.
Drivers drive various lines around the circuits.
I've seen as many as 3 cars side by side entering turns. Cars will dive in and out of the draft line to make their moves. The AI cars do make mistakes at times, such as banging into the wall and spinning. Despite their errors I have yet to bring out a yellow flag. Yellow flags appear with the same frequency as Halley's comet.