As far as I know, that's not how state residency works.
http://www.leg.state.fl.us/
That might be a little difficult to prove if one simply moved to the State upon acceptance.
I don't know but I think schools have their own policies. I think USF allows people to move to in state status after first year as presented above. In fact, I know they do because a guy from Philly is friends with one of my friends and a med student at USF. he was allowed instate residency status after first year from what he told me. Same with another one of his classmates from out west.
I think it works similarly in some other state schools in other states since I know NJMS does the same thing. Im sure there are others that do so as well.