GT4 absolutely has torque steer, and brake dive, and wheel hop, and weight transfer, and brake lock ups, and everything else you could think of.
If you want to see torque steer in GT4 however you have to take off all the TCS and stability management in your car settings menu. TRUST ME!!! YOU WILL BECOME A MUCH BETTER DRIVER WITHOUT THESE DRIVER AIDS. you can learn to control the throttle much faster.