I've been fortunate to travel all over the world, and its fun to see the reactions of folks when they find out your from Oklahoma.
No accent here (although I have been accused of turning okie by family, lol), but I have seen this.
Went home for Christmas one year, and was out for a drink. My high-school english teacher was the bartender, and when he saw my Driver's License, he said "OKLAHOMA?!?!? Why's your driver's license say Oklahoma?" "...because that's where I live...."
Guess he couldn't comprehend why anyone would want to live here, lol.