yep....the S is very quiet.....My wife's M3 was very noisy....I was very disappointed.....I got some door seals and placed on the door all the way around......then I got some tire well inserts....now it drives like the MS with hardly any noise.....
The biggest issues were tire / road noise....now it is nice to drive...being lower to the ground, the M3 can be susceptible to that kind of noise.....I got my seal and tire well inserts from RPM Tesla....