If I reduce the shutter speed, it will lose the purpose of take motion blur photos.
The reason I bring this up is many people in photomode community are big fan of motion blur photos that the car is very sharp while the background is blurred. It is possible when the camera location is far from the car, but when the camera is near to the car, the car cannot be focused fully because the camera is not moving with the car, like the rig setup in real life.
Some early GT4 photos are like taking from the rig too, but the final game cannot be done. Like this one,
Since there are so many motion photos (GT5) taking by PD, I still have faith the final build of GT5 can take beautiful motion photos. All we need is time to explore the options.