found this on one of the GTA boards regarding the huge outcry about driving psychics
First off, don't worry, the driving isn't like MC:LA, the closest to "arcade" feeling you'll get, is while driving a tuned up super car as Franklin. The driving is similar to IV, but feels tighter, and more responsive. "Less boaty" would be how I would describe it. Driving differs between the three Protagonists as well.
As Franklin, it's easier to maneuver in a vehicle. Vehicles feel more responsive, turn harder, and overall just feel smoother to control. Drifting, J-turns, barrel rolls, etc, are all easier as Franklin. What do I mean? Say you take a 45° turn at 40 mph as Michael in a small car, you would end up hitting the wall if you didn't slow way down and hand break hard through the turn, as Franklin, you don't have to compensate as much, merely turning and lightly applying the breaks will see you drifting through that corner with ease without having to slow down as much.
So far, the driving's been a lot of fun, less spinning wildly out of control, and more getting to where you want to go. Those of you who want to do some awesome "Fast and the Furious" machinima will appreciate the "super cars." They differ from normal cars, they can turn on a dime, accelerate to top speed in a mater of moments, and drift through 90° turns like something out of a movie. They're truly in a class all their own. Don't worry, if you're a fan of GTA IV driving, the normal vehicles in the game handle roughly the same, just slightly tighter. The big trucks still feel heavy and tipsy at high speeds, and the small cars are light and nimble at low speeds. (Like the Honda civic esque car from IV)