Metro considers itself traditional fixed rail, not light rail.

  a metro area that didn't experience such a boom

I was responding to the specific claim "Light rail will create demand to live near and locate businesses near the stations." The point isn't about whether a broad area benefits from rail (vs. no rail at all) but whether adding light rail to a fully built-out environment will drive more dense business development near the added rail and because of the addition of rail. I don't know of any USA data that supports that.