I guess the setups for all future GTG's need full peer review prior to the event to ensure scientific validity. All comments need to be subjected to peer review prior to public posting. Someone will a full technical background and experience, preferably at least a full professor at a leading academic institution, will have to serve as the editor.
All measurement equipment will have to be validated prior to event, the person running the equipment will require proof of training, minimally a professional certification for each piece of equipment.
To study the perceptual aspects, a different cadre of experts will be required. The disciplines of neuroscience and psychology will have to be engaged to ensure extraneous variables that were not accounted for in the validated study plan are dealt with. As the study involves human subjects, the entire GTG plan will have to be submitted to an institutional review board to ensure proper protection of human subjects.
Of course we will require a null hypothesis, identification of independent and depended variables, and an a priori statistical analysis plan. To ensure listener bias is not factored in the testing will need to be blind, preferably double blind.
Sounds like a lot of work....and no alcohol consumption by anyone at anytime during the event.
It's just like taking work on the road, count me out. I get enough science during the workweek, not on the agenda for weekends.