I've seen Cayennes run at TWS several times during DEs. They were usually pretty quick. The big issue is driver there. They have to realize what they've got and drive accordingly.
I was also at a Ford SVT event and they had about 10 F150 Lightnings running. OMG some of them were fast. OMG some of them were farm trucks.

Probably the scariest one I've seen is a Jeep Cherokee SRT-8 at Sebring. the sucker passed me in a corner.. on street tires. I was on R888s. He was probably 15 sec a lap faster than me, but most of that was sheer power on the straights. holy crap was that guy fast!