No, at one point in the video he says that they use the marshall poweramps and cabs for foh ... they even show a mic'ed cab as well ...
Raf
ps : so my guess its IR for inears only
I didn't take that from what he said and it wasn't conclusive. "One feed goes to FoH, one feed goes to our in ear monitors and one feed goes through the old faithful power amps into the cabs and in your face".