the nyt proposal is a weird way to divide up the midwest compared to a dialect map.
http://aschmann.net/AmEng/index_collection/AmericanEnglishDi...
http://cascade.uoregon.edu/fall2011/humanities/west-coast-sp...
http://aschmann.net/AmEng/index_collection/AmericanEnglishDi...
http://cascade.uoregon.edu/fall2011/humanities/west-coast-sp...
Edit: now that I look at it, I would also question their "Urban Corridor" from Los Angeles to Las Vegas... unless they mean people travel between them easily. That corridor is mostly desert.