In the FWIW's department, when I was growing up and attending school in Alabama we never thought of Florida as a southern state. We thought it was what it was: a gathering spot for Yankee retirees. Hasn't changed, either.
Given the increased numbers of Northerners who are moving into northern Virginia (I understand that Fairfax County--adjacent to Washington--has over a million residents now), Virginia is becoming less and less of a Southern state.
ah see, northern FL is still the old south.