I just got back today from using these for auto-x on my 93 Corvette with Z07 suspension and aggressive alignment. These tires just plain work, even on a heavy car in cold/wet/dry conditions. It was actually snowing and later got up around 45 or a little less. I kept pace (within a couple tenths or so) with near FTD C5Z06 (Hoosiers, not good at all in those conditions). I was impressed, dry grip is excellent. Breaks away predictably and smoothly. Tires do perform in cold/wet/dry conditions, with due caution exercised.
Quick warm up on tires, only 3 runs and they were warm. Grip got better as I went.
Excellent tire and works well on my Corvette.