Originally Posted by AdrianM

No, stiff setups on pan cars and sedans cause traction rolling due to too fast weight transfer when cornering. The traction is high, you let off the throttle, turn and all the weight of the car shifts forward and to the outside tires and pins them to the ground...over you go. All the energy goes directly to the tires contract patch as a sudden spike in pressure.

With a softer setup, you let off the throttle, turn and the chassis rolls. Some of the energy is absorbed by damper tubes and front springs. The increase in pressure on the tires contact patch ramps up more gradually and the car drives smoothly and more predictably.

Stiff setups also wear tires faster. Its all a balancing act. A fast car uses tires and suspension together.