Yeah, I saw that same concert footage on the local PBS station here in Nashville and thought they were amazing. Not a big fan of 'tribute bands' in general, but still wasn't able to find any holes in their presentation. Put them on much the same level in the entertainment industry as 'Elvis impersonators'. Very accomplished as musicians/singers better served by doing their own stuff and taking their lumps and successes on their own terms. But, a gig's a gig, I guess. No question they're very well compensated. There's a group in NYC called the Fab Faux doing much the same thing.