Lloyd, it seems to me that your day job and the vast number of people in the world that enjoy music and opine about music is similar to the far smaller, more select crowd that opine about GCA, who have no practical experience with it.
Many, can't play/perform a lick of music, yet have critical thoughts of various music and performers that they put up in one form or another through cyberspace parking lots of ideas. (forums) Some of those non-musicians hold plenty of sway in the form of guiding market attention to music products. I'll bet some musicians and performers get angry with the non-musically talented, who sway public consumption. Yet, I'm sure there are some non-musician performers who commentate and opine that have taste, and accumulated comparative knowlege that a musician would even have to say, they appear to know their stuff.
I'm always amazed when cruising the music offerings on U-tube, how many (apparently highly talented folks, particularly young folks) are sitting in some room at the end of a bed, or a chair next to their computer, recording outstanding pieces of music to share with the cyberworld. People we may never hear their name again. The world is so full of talented and smart people, who could opine, perform or drive taste, in both music and something like GCA, that it may be arrogant of us to believe that there are too many cyberexperts in anything.
How many people are out there that have the innate intelligence, and capability to be another MacKenzie, Dye, Doak, and won't/don't or aren't even motivated to try? Yet, they may have an opinion or insight on some aspect of the GCA profession or product that is fresh, well thought out, and simply would go by the wayside if they didn't have this instant medium to express the thought?