Embarrassing... tonight I blew the doors off a 2010 M5, had him by 2 car lengths. It's what came next that made me tear up.
Then, we get off the freeway in mexico and hit a red light, he gave me a thumbs up for beating him and the light turns green, did a 2nd gear launch in DS, shifting to 3rd my car started jerking back and forth, I just kept my foot on the floor and finally 3-4 seconds later it worked itself out. M5, long gone... oh well