I tried out the demo last night. I think they are really exaggerating the body roll and diving when braking, not to mention all the bouncing around. Unless Indy just has a terrible surface on the track. It is like the camera isn't securely mounted to the car.
Shadows are really chunky, even inside the car, and don't appear to be anti-aliased. Perhaps they are, but the resolution is so bad that it doesn't make a difference. The shadows from the fence don't fall on the car, they fall UNDER the car, which just looks strange. And in replays, the car's shadows get smeared by the motion blur, as if they are attached to the scenery instead of the car.
There is essentially no difference in tire squealing audio between spinning the tires and turning, and they both sound awful. The audio seems very muffled compared to what I'm used to in Forza, but I race Forza in hood cam, and Forza changes the audio positioning based on where the cam is. In GT, it appears to always keep the player's ears inside the car, which sounds overly muffled to me. The sound from hitting sand is really quite harsh (don't do that and you don't have to hear that
). The music in the menus is AWFUL.
The game is REALLY hard to control with the sixaxis, and I have those trigger extensions. I have a Logitech wheel, but I haven't pulled it out, yet.
The track looks pretty bad. The grass texture is completely flat. Trees still appear to just be flat polygons, but they are now shoved in at different angles to give the appearance that they are 3D.
On a positive side, the cars look absolutely stunning, and the reflections are awesome. They need to apply that kind of attention to the rest of the game.