That's true, I've lived in Texas and now California. The accents vary a lot, even within Texas, DFW, South Texas, Austin have slightly varied accents; the only thing in common is when Texans say "ya'll"
I'm also glad to see Michigan properly represented. Us trolls that live under the bridge are quite different from the Yoopers who have more in common with Canada and cheese-heads. All in good fun though :)
I've been living in NYC for a couple years and I've adopted some words and also had "pop" beaten out of me for soda.