I too had that conversation with Gary about his turning to Powersoft. That's what he said.
Most of the larger touring companies have chosen Powersoft for amplification. Next by numbers is Lab Gruppen. Of course, JBL systems are powered by Crown.
I demo'd Powersoft and Lab Gruppen amps, right down to a two Ohm load using "real" low frequency program. On the edge, the Lab's lost it. The Powersoft amps sounded just fine no matter what you threw at them.
Often times, it's not about what's in the specs or the test bench results. It's all about what it sounds like to human ears in actual use.