Actually, from time to time, if you hit the right pubs, you will hear/see the real natives of Fairfax, Arlington, etc. I actually live right next to a neighborhood that is still full of true southernors, who have the twang and the ya'll. They don't mix much in the Trader Joe's or Tysons Corner though. You find them in the little diners, mom & pop shops, and convinience stores. Everyone else is pretty much transplants (much like myself).