I think the interesting thing about this comment and the other reply to it is that there are actually several different subgroups of people who all will have different takes on this. I meant cultural elites the way bluefirebrand described it (I'd put it a little differently, but still), but as you say, there is another group that you could call cultural elites as well (though this isn't usually how the term is used)
The nice thing about letterboxd is that many different subgroups are represented, so you can find the reviews you vibe with and get a better idea of whether the movie will appeal to subgroup you're a part of.
There's probably a pretty decent youtube essay on like the balkanization of culture and also the construction of identity through consumption, and how social media has turbo-charged all this here.