Yes there is such a thing indeed. Southern natives..even those from Florida
typically speak with a drawl... which is slowly with a heavy, lengthy emphasis on the vowels and tone. Alabama, Georgia, Tennessee... the deep south... aka the Dixie states have this more considerably than the more transient Florida individuals.
Ian has what I would best describe as an accent.. distinctively British.. showing more emphasis on the syllables in the sentence one over the next.
Then there is a twang.. lol.. but that's probably TMI (too much info)
Suzy