Raised Doughnuts: Also a “Southern Thing”?

Though doughnut allegiances were never formally declared after the first shots were fired on Fort Sumter, there does seem to be North-South divide when it comes to doughnuts styles. I submit as evidence Krispy Kreme, a chain out of Winston-Salem, North Carolina, which specializes in yeast doughnuts. Dunkin’ Doughnuts, which began in Quincy, Massachusetts, was founded on cake style, though now it does both (Krispy Kreme did cake style too, for a while, but abandoned the product line a few years ago due to poor sales). My own unofficial survey of small doughnuts stands in the U.S. seems to confirm the North-South yeast-cake split. Offhand, I can’t think of a reason for it. If anyone has a theory, by all means send me an email.