Southerners: if I ordered a regular iced tea, what do you think I want?

Here in the south there is almost always unsweet and sweet tea available. Today I ordered a regular iced tea not really thinking about how I worded it, and they gave me a sweet tea. When I pointed out it was sweet, the guy said to him sweet is regular.

Not to mention I think the terms unsweet and sweet are a bad way to go, because sometimes unsweet sounds like sweet in a noisy place. Why not use two words that sound nothing alike?

Up north there is tea, and then there is flavored tea and sweetened tea, etc.

Anyway, I don’t know if it was just this young gentleman who thinks regular is sweet, or if most southerners, and maybe others, think regular means sweet also? I was curious, so I asked the question.