There was another article about how participants for a few minutes in a blind session won't be able to detect differences but over time, they surely would.

What you are missing from what Mr. Lofft or others might say is that the terms bright and warm can only have value in the context of what other speakers sound like. I believe Axiom M60s are bright and forward when compared to many other speakers. Were Axioms no different sounding than other speakers, you would have no reason to consider Axioms over other speakers.