I was raised with cornbread and sausage stuffing.
When I first moved to Maine, a friend invited me to her home for Thanksgiving. Eating the stuffing, I noticed that among the soggy bread were... potatoes?! I had never had potatoes in my stuffing. She was from Aroostook County, land of Maine potatoes.
While I had not had potatoes in stuffing before, I had eaten potato filling in Lancaster County, PA. I thougt that was a potato side dish with seasoned bread crumbs. Didn't make the connection that it was "stuffing" that could have been inside a turkey.