In suburban traffic like you describe, I still drive the speed limit and do not attempt to match the speed of the people who are in a perpetual hurry.
As for their honking {and occasional rude gestures
} I just ignore them and try to remember that they are a picture of the old me {the perpetual hurry and occasional honk part, not the gestures part}. I can't get too mad when I realize that I am looking at how I treated others before I decided that the couple minutes I might shave off of a thirty minute drive weren't worth the extra stress in my life.