I don't get it. I thought it was supposed to be a joke map, but instead it's accurate. Oh well.
fwiw, I don't say "Warshington", though I know people who do. The county I'm from itself has four or five different accents. Last year my father, who is from Pennsylvania and didn't raise me, came to visit and said that since he'd moved to Mississippi and then Virginia he'd realized we didn't have southern accents. We visited Logan County that day, and he changed his mind a little (in truth they talk more like Kentucky).
This is just a weird place. You'll never figure us out; you might as well stop trying.