Look, everbody has different perceptions.
My buddy has an A4 2.0T with 200hp and when he drove the 335 he said "it didn't feel that fast". Weird, when the car has over 100hp difference, but what can you do.?...people are people.
Or maybe the OP as a modded 335, and then I am not surpised at all. The new M3 is not the fastest thing on the planet.