I just spent the day at Button Willow config 13 and had the car out for 5, 25 minutes sessions.
I don't think I had any issues with the DCT, there were a few times that it didn't down shift when I wanted, but I attributed that to the RPMs were to high. I don't believe it was due to heat. My issues were that the car would not turn! but its stock, on run flats.