@chayro , not at all because in AB testing you are comparing two subjects with the same frame of mind so whatever your frame of mind is cancelled out as long as no biases creep in which is the tough part and why double blinding the comparison is the best way to avoid bias. None of this is that serious. It is not like we are evaluating medical treatments. I do AB comparisons for myself and my own education and could give a squat over what other people think.
The problem for many people is they trust their own perception. This just does not work well for hearing. The result of all this is an entire industry based on deception. As long as it is not my money why should I care?