[rovolo]

The generous interpretation of "suburban America" is that both the author and interviewee live in the suburbs:

> I grew up in Temecula, a California suburb

> his house in Laguna Niguel, in a trim suburban neighbourhood

But the project started off in an urban area:

> In the fall of 2004, Frank [would] drive through the darkened streets of Washington, D.C., with stacks of self-addressed postcards

I think though that "suburban" is playing the same role as "middle-class". Despite the technical definition, I think both terms imply everyday, normal, boring, "real" Americans. I agree this usage is weird and I wish people would stop using "suburban" this way.