The most important map...ever.

Forget your little electoral and polling maps. Strange Maps has a post on the most important map ever, that answers a vital question with empirical data.

Soda, tonic, coke, or pop?
I have little to add to their analysis. I do wonder how we ended up sharing linguistic preferences with the Mississippi River valley along the Illinois-Missouri border and Eastern Wisconsin. In any case, I would like to commission these people to conduct a studies on the following questions:

Where is the bubble/water-fountain border?
What is the hoagie/derby/sub situation nationwide?
Is frappe dead? How about dungarees?
Is this officially further proof of the backwards, troglodytic nature of the American South?