The sales reps at Jay Kos seem disproportionately maligned. Yes, they can be snooty and ignorant. But this seems to be the case at a lot of high-end men's clothing stores in NYC. For example, Brooks on Madison can be just awful.
I wonder how much iGent dissonance over Jay Kos goes back to the Boyer event at one of Jay's stores a few years back. I don't know the exact details behind it, but Jay explained to me that a number of AAAC members were there who fancied themselves experts. They began scrutinizing Jay's merchandise for workmanship and criticized it. Annoyed (in retrospect, one wonders who wouldn't be), Jay compared his stuff to the things the AAAC members were themselves wearing. The AAAC members were offended, and since then, Jay has been known for insulting what people wear into his store.
For his part, I think Jay is still at least somewhat paranoid about AAAC-types coming into his store (people he thinks are fixated on clothes but don't have style). So, if you ask him something like, "Who made this?," he is not unlikely to respond: "Why does it matter? It is what it is; the quality should be self-evident."
Anyway, just my two cents. Also, I should disclaim: I had an issue with Jay over an undelivered belt that I made very public on AAAC that has since been resolved, but Jay's reputation on AAAC for being an arrogant snob had already been established by then.