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.
Interesting. I’m driving from Raleigh to Northern VA tomorrow with lunch in Farmville, VA. I’ll have to test this theory. Can corroborate that NC “tea” is super sweet iced tea.
Edit: Hmm, so I asked for tea in Farmville, VA and the waitress asked me “sweetened or unsweetened”. We told her what was up and she admitted that she was from further north in Virginia, but she had learned to ask while working there. Where she was from, tea would be unsweetened unless specified.
So … Maybe there is a bit of a DMZ in Virginia before you fully cross into unsweetened territory?