Early B - to be clear I wouldn't, and didn't, argue that Tyson didn't "hear" what he claims to have heard, i.e., an improvement in sound quality upon switching binding posts, and ok, hook-up wire. No person can comment, with knowledge, on another person's experience. That's obvious.
Regarding confirmation bias, I argue that it most certainly is relevant and operative. Your post confirms as much albeit you conclude "who cares"? I'm with you on that point. If a person believes that the mod they performed improved the sound, well, then it did at least for that person. I happen to be in your camp rather than the objectivist camp, i.e., a mod must be empirically demonstrably better. Or blind testing must reliably confirm the improvement. As I've argued previously, I don't care as much about objective measurements as I do about subjective evaluation. We're aligned there. That doesn't mean, however, that confirmation bias isn't present and/or operative. Do you believe, for instance, that the WBT posts Tyson replaced would demonstrate superior electrical properties sufficient to improve the musical presentation? Perhaps , but I'm skeptical. Certainly WBT hasn't posted anything objective, i.e., empirical data, supporting such a claim. But, no matter. If Tyson feels the WBT posts improve the sound, that's all that matters to me. I'm no different in that respect. But, again, that doesn't diminish the presence of confirmation bias...
All of this, for speaker binding posts, reduces to Tom's comment that he doesn't hear a difference when using the WBT posts. That claim is as legitimate for Tom as Tyson's position that he does hear a difference. Each is driven by personal motivations - Tom considers manufacturing cost while Tyson sees potential for improvement - and, lo! each hears something different. The very essence of confirmation bias... among, perhaps other operative issues as well such as aural acuity, etc. There's a difference between "meaningless" and not "operative" in any event.