Okay, this maybe true--but the converse is as well.
I'm one of those jerks who drives the speed limit, mostly. I tend to keep to the slower lanes. What peeves me off the most are self-righteous jerks who tail gait you in the slow lane when you're still going about five miles over the posted limit.
So even if I'm going 60 in a 55 mile lane, and the passing lanes are free, GUARANTEED, there's some jerk-wad gunning behind me (often in one of those crappy little rice mobiles). Do they pass me? Heck no.
Stay off of Colonial/50 in O-town.