I think UF's 'southerness' really depends on who you ask. I didn't have a southern accent when I got there, but after four years in Gainesville (and spending time with sorority sisters who did have accents), I acquired a faint one. It was apparently very audible by the end of recruitment every year, and I was routinely teased about it.
ETA: I have a (Cuban) friend from Miami, and we joke that Miami isn't 'southern' - it's Cuba!