ive found its much faster with tc, just like in real life, and i play with logitech steering wheel. Ice McLaren you cant control traction control for AI.
I think totana_05 means throttle control, when you press the accelerator without out TC on, many pedals/wheels you just touch gently and it applies full throttle unrealistically and spins you out. thats why you have to setup the pedal sensativity in settings.
some of the older mods seem to be a lot easier to control without tc, thats because of the perf/phys files.