Just about every time I have pulled off to let others by, I have received a thumbs up, a wave or a friendly toot of the horn. That is mainly in PA and WV, though. I would never get that around here, where I live. Here, I have to back into my driveway from a four lane road, divided by a left and right turning lane. It takes me all of two minutes to do, but those cars just have to drive around me on the wrong side of the road, the drivers flipping me off and blowing their horns.
Drivers in Northern Virginia and the DC area, in general, are the most selfish people in the world.
Bruce