@gasman In Eastern MA, they do not always change lanes when they go to overtake you; they just speed up and leave i to you to get out of the way. If you leave more than a car-length, somebody will squeeze in.
In VT, they generally drive the speed limit; a little slow on a sunny summer day, but the same speed on ice in a whiteout.
In Seattle, they drive slowly unless/until you go to pass them, or are in front of them. They will run up behind you at 10-over, pass you, then slow down to 5-under, but will speed up when you change lanes to go around. Sometimes, the only reason I get anywhere is that people interpret the huge skull on my hood to mean that I am more homicidal than I actually am and I intimidate them out of my way.