I’ve noticed that. Living in Virginia I see the folks going north and south on the 95, and almost always without exception the PA drivers are tailgating, passing, going 20 above the speed limit.
NJ - Drive like they're in NYC, no turn signals, will try to merge/squeeze into 3 inches of space.
NY - Must not have lane rules, they just sit in the left lane regardless of speed.
PA - Highly aggressive and dangerous. Will tailgate you, will brake check you, will drive 30 over and punish you if you happen to block their path.
FL - Wildcard. Everyone is from one of the above, so who knows which you'll be dealing with.