I notice this most when I am rushing down North Hall on the High School server. I always take a scoped potshot at the boxes near bombsite A while running, and miss the vast majority of the time even though the scope is on target before and after the shot. Unfortunatley it rarely misses in the same direction from round to round so I'm unable to compensate.
It's not much of a worry to me though, I'm too busy having fun playing with everyone to be bothered.