Originally Posted by 4r3s

when you floor an AT it will go up to redline bounce off the limiter and then shift if you don't adjust your throttle. you can make an AT shift by letting up off the gas briefly too but its slower than the paddles. By using the paddle shifters you are removing some of the ecu processing and therefore able to shift faster (I'm pulling that out of my arse but it sounds reasonable to me). I'm really impressed he got a 12.9 stock, when I went, stock, I got a 13.3 but it was in the heat of the summer 90+ degress with 90%+ humidity. I can't imagine cooler weather could make nearly a half second difference for me.