^^ I think when it gets to this kind of level its all very subjective. Does everyone have the same hands?? does everyone have the same tongue?? So why would everyone assume we all have the same ears?? 
Its not about what other say sounds better... its about what you think sounds better!!
Actually, yes, we do have pretty much the same mechanisms in our head related to hearing with generally the same sensitivities; 20Hz to 20kHz, plus or minus. The last time I measured mine I could hear down to about 16Hz and up to around 17kHz. The younger you are and the more careful you've been the more likely you are to hear down to and up to these limits.
But, the major problem with people's hearing is that it's crap. Generally speaking.
For instance, our memory for how something sounds is just several seconds so comparing whether one sound is "better" than another is problematic in the extreme. You may
think that this is not the case but it's a fact. So, for example, people comparing one set of speakers to another by switching cables (which may take a few minutes or so) are wasting their time. Of course, if they sound vastly different that remains fairly obvious but comparing subtle differences this way is very difficult indeed. It's why a/b and abx switch boxes tend to be used so you can switch instantly from one to another.
There are also problems with our mind interfering with what we hear; put in a impressive looking thick cable that you think will improve the sound and you will hear an improvement, sometimes dramatically so. Put on a blind fold, change the cable for a piece of lamp cord of adequate gauge without the person knowing and they will still hear the improvement. Remove the blind fold and suddenly the sound will be awful, "constricted", "lacking air", or whatever silly euphemisms audiophiles use these days.
Our hearing is so prone to influence by other factors unrelated to actually what we hear that the only real way of objectively making judgements with regard to sound is to perform a blind test, preferably double blind. These psychoacoustic principles are well known and documented.
