I'm not a die-hard measurements mean nothing type. But as I said earlier, I've been using this amp for months and it sounds fine to me. Without these measurements I never would have known... Maybe I have bad ears. Maybe the bad performance isn't audible. Maybe this. Maybe that.
They have no frame of reference aside from their own ever changing power of perception. Of which could at any time shift, and placebo themselves into thinking one thing to another depending on the day, or situation. While measurement devices have only so much that could change about them that would lead them to spit out varying results. Lastly, measuring devices don't measure how much you'll enjoy something. They measure performance based on a set of metrics. They're just more tools that give people a better idea if this is something they may want out of a product. I always tell those lunatic subjectivists, to measure power output without using any machines. Lick your finger and touch a live part, and 'feel' how much power there is... literally, see how that works out since no machine could ever tell you anything.