Quoted:
Most Virginians are pretty courteous (those that aren't transplants) so I don't see it as uncommon.
Like my Dad used to say when driving down country roads and we would meet a vehicle, "always wave back 'cause who's driving might be who you are asking permission to hunt on someday". LOL
You're not up in NoVA much, are you? I can't say I blame you though.
I am a "transplant" and yet find a significant percentage of the people here rude and self-centered. Heck, I darn near got myself pepper sprayed when I stopped remembering where I was and offered to help with w broken down car around here.
Even the people born in the area, around (self)-Centreville, have little common courtesy, and no table manners. There are fewer transplants here than you think, but probably enough.
This also contributes to the traffic in the area - self-centred people careening through traffic while chatting on cell phones do not merge well. Add the driving styles local to where the transplants come from, some people from DC and MD into the mix, and it pretty much explains why even adding an additional lane causes a traffic jam around here.