I always beat m6s, m3s, anything with an M, I have beat. I have a auto 2008 328i with black wheels btw. Its pretty badass, lights on the door handles too.
What I do is, I see an m6 on the freeway right, I put the pedal to the medal (ebay ac schnitzer pedals, also pretty badass btw), I get up to 140 mph and fly by the m6. BAM, SMOKED.. Create a thread, Now I have 200 internet bitches because SWAG.