The Greater Columbus communities beyond the first ring suburbs are the ones where I think we'll see the real fossils left of overbuilding. For example, my old school district (Southwest Licking, which includes Watkins Memorial) includes the towns of Pataskala, Etna, and Kirkersville. It also includes a great deal of unincorporated township land in between those communities. There was a lot of poorly planned construction there even ten years ago when I was leaving high school. I recently went back for my ten year reunion, and one of the afterparties was at a newer-build home in one of those characterless, rabbit-warren developments that grew up in recent years. There were a lot of clearly empty homes, and I checked Trulia when I got home, just out of curiosity, and found a lot of the homes in the development were REO (bank-owned following foreclosure).
There is a bright side, though: the housing collapse made some of those modest suburban homes more affordable to those on modest incomes, which unfortunately includes a large percentage of my graduating class. The house where the after-party was was at the home of a security guard and a recently-started high school teacher (she'd been working 2 or 3 years at that point, I think). I'm not sure that the house was even finished (there was a steep drop downward from the back door off the kitchen, suggesting that a deck might have been planned there at some point), but it was a pretty decent place notwithstanding that for a starter home for a new couple.
Tying this somewhat into myliftkk's point as well: People are indeed putting off marriage longer. However, cohabitation seems to be on the rise as well. Seeing what it costs to throw a wedding these days (which, as I mentioned above, I'm currently experiencing firsthand), I can sort of understand why people might be inclined to wait, even if they think they've found the one they want to be with forever. I think that both members of that couple owned that suburban home--but they're not married.
As for Kunstler, I've said that I think he's wrong on a lot of major points, and he's among the worst friends the urbanism cause could have. That column hasn't changed my mind. I think history will remember him the way it remembers the economists of 1980 predicting that the dominant world economies of 2010 would be Japan first, Germany second, and the USA third.