Essentially we may be witnessing two parallel, and notionally conflicting developments, notes analyst Mark Schill of the Praxis Strategy Group. There are clearly a series of regions, as identified by the report, that have achieved critical mass in software and across many other tech fields. Yet at the same time, the most rapid growth is taking place largely in non-traditional tech hubs, including places like Salt Lake City, San Antonio, and Phoenix, all seeing rapid growth in tech jobs as well as a growing concentration.