I've seen the article to which you refer and find it fairly accurate in my limited experience. One factor that comes into play, in my opinion, is that there are vast areas of the U.S. that are still quite rural, not only in location but in culture. Here in the western U.S., "close" friends isn't "the Cowboy Way" (maybe more so for Cowgirls)... One can have acquaintences and spend time with friends, but spilling ones guts about personal matters is frowned upon. (Rightly so, in my opinion). The large metroplexes engenders the "Friends" TV program interactions, as does campus settings, but here in the outback, on can certainly depend on ones neighbors in a pinch, but we refrain from discussing and "sharing" those things that should remain in the family...