I attended music school for a short time after college (not Berklee). After having done a very tough BS in physics, I found the slow pace of the music theory classes pretty frustrating. I worked ahead, but not at the pace I probably could have. I very much agree with his point about not letting others (i.e. courses) set the pace.

Also, having another degree I think I had a different perspective than many of the high school graduates that where there with the idea of becoming a rock star or whatever. Most of the instructors, etc, made their livings by teaching, playing random gigs, doing essentially anonymous studio work, and odd jobs. Music is a very hard business. This reality seemed mostly lost on the majority of the students. I decided that I was probably happier to have a "real" job and play music on the side.