It's just The Way It Is.
I live in the Northeast (hint - Yankees Suck!), and when everyone drives like that, you get more cars through the green, and everything goes smoother.
I've also lived in NC, and sometimes the third car wouldn't make it due to the inability of some people to stay on top of their driving.
Obviously, these are generalizations, and there are always exceptions, but I think asshole driving = better driving.
NB - Asshole driving =/= road rage, which is an special, advanced case.