Oh, I know it is! My accent is Tidewater. Relatives from the Roanoke area sound decidedly different from me and my spouse’s.
My personal peeve is the broad, deep South intonations which give Northerners the faulty impression that everyone who has a drawl is stupid.
Being a DC metro denizen, I have run into that particular prejudice many times over.
I lay a Florence King commination service on them!