It amuses me to no end how people will agree that other pretentious idiots are pretentious idiots, but zealously cling to the belief that the thing they're pretentious idiots about is really different. Audiophiles laugh at scotch drinkers, but claim they have golden ears and truffle eaters laugh at audiophiles while claiming that they can pick out out truffles that grow on north-facing slopes as opposed to south-facing slopes. And scotch drinkers are just as clueless. In legit double blind tests people who claim to be able to pick out the smoothness of their favorite 18-year old do no better than audiohpiles who can't tell the difference between Monster Cable and coat hangers and gourmands who can't differentiate between real truffles and 100% artificial truffle oil. Show me the results of a legit double blind scotch tasting that demonstrate that you guys are different.
I think part of the problem is that you're talking about two different types of pretentious people. One is the people who claim to be afficionadoes of a type of thing (be it Scotch or truffles or wine or cheese or whatever). The second is people who claim to be afficionadoes of a specific
brand (Grey Goose, Monster, etc.). I think you'll find pretentious twits who don't know what they're talking about in both groups, but in my experience, people who claim to be fans of a specific luxury brand (particularly one with a massive advertising budget) are far more likely to be full of shit than people who just claim to like a particularly expensive indulgence in general. So if someone extols the virtues of single malt Scotches and can speak to the differences in Scotch styles by region, I'm less inclined to think he's full of shit as compared to the person who extols the virtues of Johnnie Walker Blue Label because he knows it's expensive. And anyone, even someone who has never tried a drop of Scotch in their life, would be able to tell the difference between Laphroaig and Ballantine's; they might not prefer Laphroaig, but it's about as distinct a difference as the difference between vodka and rum.
I've always been more of a bourbon guy than a Scotch guy, and I'm fairly confident I could identify something like Booker's versus Evan Williams in a double blind taste test. And, hey, if I can't? You just saved me a shitload of money; cheers.