That's right. It's one thing to see obvious things when you're posting on the internet, quite another when you're in the middle of a demo and you have half your energy concentrated on projecting yourself to the crowd. Phil happens to be very good at that, but I think it's only fair to cut him some slack.
As it happens, I find the solo and mute functions to be a great feature in Logic. I love being able to mute individual notes in the Matrix editor. That's useful for a lot of thigns.
I'm not knocking him. I think we've all been there. Phil is a nice, funny and knowledgable. In fact, I saw BT give a demo and had a similar problem. At one point someone from the crowd yelled out how to fix the problem. I think Phil's issue what that he had muted a bunch of tracks rather than solo.
The mute and solo do work well in general, but there is the case where one thing is soloed and you have to go track by track looking for it.