If there is a line of cars behind you, you are the problem.
I usually drive as fast as the car in front of me will allow.
I feel comfortable with the space between me and the guy in front of me, but I suspect from their point of view, I'm probably up the butt.
Sat at a red light the other day for four cycles of the light (our left turning arrow never changed), finally honked my horn at the guy in front of me, he just points to the red light. People behind me were going around us. Three seconds later the light turns green. Figures.