I don't think the AMG fits in this group of cars at all. It's sheer HP probably saved it on the track times because there are quite a few straights on that track to really open up the speed. (truth be told, I hate the way the AMG GT looks)
Neither does the Bently. I'd have preferred to see more Porsches and BMWs in the test, but I guess they didn't debut in the right model year.