> That said, Hacker News readers shouldn't be surprised that people use jargon to demonstrate membership of an in-group or keep away outsiders.
To say that HN readers use specific keywords or acronyms is inaccurate, given the diversity of topics that make it to the front page. However, the discussions I see take place here are definitely of much higher overall quality than the average comments thread on other sites.
That said, Hacker News readers shouldn't be surprised that people use jargon to demonstrate membership of an in-group or keep away outsiders.