11-17-12: Tbg
Douglas_schroeder, were this a science there are many factors that would have to be held constant, such as time of day, as electricity demand varies, holding all other things constant, choice of music, etc.
I agree there are infinite number of dynamic variables but you should minimize as many as possible in an experiment. In this case, one obvious is performing the test in the same system. I can't believe you are arguing this point.
But it is not a science; it is a consumer's decision about purchases. If Liguy is satisfied, that is it.
Purchasing decision is not science but the test that lead to the decision IS ... logic, common sense ...