I hate TC. The Park has a TC system that is far more aggressive than anything else in GM'* line up. The slightest little bit of spin and the ABS starting kicking, and then, if you persist, it pulls one whacking big chunk of timing and then drops injectors.
If you turn off the TC with the button, it kills the ABS reaction and dials back the timing pull just a little bit, but it'* still a lot more agreesive than the other Series2 cars I've driven.
I always turn mine off in winter, just because I take it easy when the roads aren't great and I have great all-season tires, and if that damn ABS kick hits you while you're turning it can throw you a little sideways.
If I ever find someone to reprogram the computer I'm gonna try and have the TC eliminated.