I think on guitar forums, it is always a pejorative.
First time I noticed this was on Kemper forum, where the reaction of some dudes was to mock whomever said they felt and/or heared differences vs real amps.
Yet now CK says profiling 2.0 has "much more accurate low end". So I guess some people with "golden ears" got something right all along. And these innacuracies are now heard by CK too.
Besides, when someone claims there's no "difference" between amp and capture or model, say in terms of EQ, that can also take a discerning ear to judge.
When well known producer A says there's no difference between Kemper vs amps, many people receive that judgement highly positively exactly because of the producer's listening abilities.
My point being: it can go both ways. You need good ears to make such judgements, whether you're a producer or not. So mocking people on the basis of "golden ears" often seems selective to me.
I think a better approach is just to try and remain honest with ourselves and update our views when it's reasonable to. I don't have to believe I've got magical hearing abilities to do that.
Ps: Of course if by "judging differences" we mean someone's metaphysically subjective experience alone, pointing to nothing else, that's just mind dependent. Not much to be said there, in this context.
But that's not what I'm referring to. I'm referring to getting a whiff of differences that are non mind dependent -- they exist even in the lack of perception of minds.