I just took an M3 the other day...
I was in a particularly agressive mood and was heavy on the gas at every stoplight. An M3 gets next to me, so I am looking over to see if he wants to go.
No responce, so I shrug it off. Light turns, I take off normal and by the middle of the intersection I hear him get on it hard. So of course I am on it too.
By the end of second gear my bumper was about 5ft in front of his. Every time I shifted my car I would dip back about a foot or so until I was in the next gear at which point I would take a few more feet back.
By the end of fourth when I shut it down I was about a car length on him. He was cool about it and gave me the thumbs up. I said his car looked sweet and we were on our way.