Thoes pit crews shown are not realtime, on the DVD footage there is a noticable difference in the graphical quality, pit crews will be in GT4 if everything carries on as it's going, and why should'nt it, also you would'nt need to animate every car for them all to have the wheels taken off, the cars in GT3 and 4 are made of seperate peices that are stuck together like the car badges and the wheels (notice in GT3 when you change the wheels the car is shown without any) so that would be simple, the same is apllied to the bonnets etc but I doubt that will happen in the game, just the wheels.