In the South East, they bring you sweetened (usually far too sweetened for my tastes) iced tea. This is amazingly universal.
I live in NC and have been probing the border for years.
For “nicer” restaurants, the universal sweet tea boundary seems to be precisely at the NC/VA border.
Haha, I have no idea why. As for Americans, I think because they make up a big chunk of Lemmy users, lots of them just assume everyonen else is from there as well.