It mainly depends on what problem you want to tackle when it comes to dividing these regions. Scale is important here and decides the classification, sadly not mentioned in the article. 1) I think the article mainly wants to point out that regions should get more attention than they do now, so strict borders aren't really necessary. Besides, how would you compare this to Asia and Europe? 2) I'm a third into Geography of Nowhere. I should read further, quite like his decimation of the suburbs, albeit mostly anecdotal. US freeways are only beaten by the Japanese, but then again, those are heavily tolled roads and the US's sheer quantity is unmatched. I don't know if you know, but nearly all of Europe has passport-free border crossings. Schengen for the win. 3)Not sure what you're trying to say here, but the map is just a really vague, overall grouping of the areas based on what sorta fits on multiple areas. Not a map that has something to say about the subdivisions it claims to encompass.