Thanks to tannybrown for bringing this article to my attention. Cities in the second tier of the urban hierarchy are leading the way in growth, while major cities such as New York are witnessing a leveling off of population. Might that bode well for Pittsburgh?
The short, and obvious, answer is "no". I hypothesize that one of the factors that promotes rapid growth is a relatively undeveloped political landscape. Cities will tend to boom in regions that offer little opposition to development. I imagine something akin to a wild west or other frontier environment.
I think that just about anyone would tell you that Pittsburgh offers the exact opposite of the anarchic situation I describe. Pittsburgh is an intimidating place to an outsider. There is little chance of cracking the well-established power structure. The path of least resistance is a city in the Sun Belt, which is where most of the people are going.