Most of these are pretty shoddy, but this one is really good. It's detailed and accurate about a lot of the idoiosyncrasies.
Like FlyingSquid I would have pushed "The South" a little further north into Western Pennsylvania, and up through Missouri into south Indiana. And what in the world is "The Northwoods," that's the YooPee and Wisconsin is upper midwest. But other than that it's spot on as to a whole lot of the details. South Florida as part of the Caribbean, Washington/Oregon as part of the interior once you get away from the coast... it has a lot of little important details right.
northwoods is a regional forest, like a boreal forests but not quite one. it runs from the boundry waters in Minnesota down to duluth. through this weird gross area on the southern edge of lake superior. before finally getting into an area smart enough to say it's michigan even though its not touching michigan, thus no longer being gross. and the people living in that forest are definitely their own kinda people.
I can always tell with food. In the Midwest you don't dare use any spice except salt and maybe some rosemary on Christmas. Anything else is too fancy. The West Coast has their own style, northeast has chowder and seafood, except salmon which is the PNW. Interesting how they all separate.
I remember driving through the Midwest and I just wanted a sparkling water. Anything bubbly. They had coolers and coolers of soda and added sugar drinks, two small things of actual water, and one thing of liquid death, with added sugar. Wild place
Food is a big cultural thing, but it can also travel. For example we can get good Kimchi now. But I would never refer to a large section of the US as Korean.