The slight delay in head tracking can still cause motion sickness. It happens when visual information doesn't match your sensory information. Any delay in moving your head and the picture catching up could even be worse then just some camera shaking while you keep your head still.
Then again my wife can't look at the screen while I'm racing whatever view I use. Racing games and her don't match.
I don't use the in car view simply because it blocks half the screen. The shaky camera in bonnet view doesn't bother me. But looking into the corner doesn't work in that view since you loose track of how the car is situated on the road. (whether you control it yourself or the game does it for you) The only times I use it is on a straight to look around.
Give me a good bonnet cam view with a decent fov so I don't need to look into the corner. I'll drift through the corner if I want to see the inside :)
