What do you mean you “heard” the turntable

I don’t get it. Maybe I just don’t have the biological tool set, but I read all the time how someone heard this turntable or that turntable and they comment on how much better or worse it sounded than some other TT, presumably their own or one they are very familiar with. 

Thing is, they are most likely hearing this set up on a completely different system in a completely different environment. So how can they claim it was the TT that made the difference?  The way “synergy“ is espoused around here how can anybody be confident at all considering how interdependent system interactions are. 

Can someone illuminate me?