Yes, I lived there, too. I lived in the Rocky Mountains for several years, and my comments are just as true of the suburbs of Denver (say, Boulder) or Salt Lake City (Provo/Orem) as they are of the coasts.

Of course, if you get far enough from a large city and low enough density, you'll get fewer and fewer people walking around, almost by definition, but then that's not where most American suburbanites live.