Originally posted by Glut
Having a look @ the pit crew video, it looks like the graphics are way beyond anything seen in GT4 thus far. The shadows are incredibly detailed, they open up the doors and hood, and they manage to put the fuel tube in exactly the right spot. The car interior and engine are fully detailed and the wheels, which you see in the animation creation stage, match those on the car. That single fact says to me that the whole setup is just a bit of intro (or other) animation.
Also, notice the camera men and other pit crews - yet more polys, and on top of this the pit crew themselves are very high polygon models, they have been modeled with the visors on the helmet. If it was just for the game, the visors would have been textured on.
As for jaggies, they are an artifact of video compression - sometimes it haas them, sometimes it doesn't.