+1 to this distinction. For what the OP is observing in Portland (and other urban intellectual enclaves: NYC, Boston, SF, Seattle, Austin, etc) - this is a much better characterization of the emergent DIY culture.
Still, I think the article itself is pretty narrow in trying to economically label a loosely defined generation. The data just isn't there to support any large scale, nationwide increase in owned-and-operated businesses that are drawing in significant revenue.
I looked for it, not incredibly exhaustively, but long enough to wonder if it's out there. Moreover, the stagnant wage and salary figures, combined with increased student debt loads seemed to crowd out and more promising spins on the reality of what's happening with the Millennials.
I would love to find data that supports a real economic movement back to craftsmen culture though.