Driving like a girly girl racer your right, I don't experience any brake fade but when I decide to step up and really push it I'm breaking a hell of a lot later and harder, thats when brakes start to crack the poo's.
I was running street's last weekend and your right, that has a hell of a lot to do with it.
One thing though, are you trying to tell me that a GTS-T/GT-T with semi's can go round corners as quick as a GTR with semi's?