it's due to there only being 2xAA @ 60fps in the main game, to keep things smooth, it's a compromise im willing to have, i'm not so bothered, especially since i use the road camera.
watch a replay though with full 4xAA @ 30fps, looks sexy.
Regardless this game is about physics, and even my mates who hate forza (Gran Turismo noobs) say the physics are spot on, but they still "hate the driving"...idiots

I have to admit, I love Gran Turismo. For its time, GT was the at forefront of racing simulation (possibly not when Forza was released stacked up against GT4?). But prior to that, nothing came close to GT, GT2 and GT3 as far as I'm aware. I never played Forza Motorsport being a Playstation owner (now I have seen the light and am sticking to my 360), but I thought GT4 was fairly realistic gameplay. I take it by what people are saying that Forza was far superior in terms of simulation?
For GT5 Polyphony Digital are gonna have to pull something out, as they've got two games to whip on the 360