I have been very surprised at the discrepancy between the level of dialogue.
When the discussion on HN is around almost anything, I find myself often learning, and surrounded by comments that are smarter, and more informed than any I would find in the real world.
When it comes to gender issues though, I think we as a community in general tend to be pretty behind.
I truly love HN. More than any other place on the interweb, this one has impacted my life in very real ways. I do however, cringe when the topic veers towards sexism. I think we can do better.