When I drove F40 in GT6 on CM tires on Tsukuba using the DFPro, it was undriveable for the first couple of laps until tires got warm. Then it was predictable and exaclty like a big cart. I was turnng it more with the acceleratior than with the wheel. With CS tires I was able to push hard after the 1st lap due to easier to warmup tire compound. If that's the way it handles in GTS, I think it is pretty accurate as everyone who drove that car in dry tarmac have said that it is very fast and easy for an experienced driver. On the wet it is simply forbidden to drive due to the high-pressure twin-turbo lag nature of the engine making it horrible in slippery conditions.