As far as I can tell, HN is much more of an extreme monoculture; and one I have to confess I'm rather disappointed in. Instead of thoughtful discourses and commentary from those looking to expand their worldview, it's a strong current of close-mindedness and superiority.
I'm sure that my brief glimpse into the culture of HN is woefully inaccurate and I may certainly have just unluckily gotten the wrong impression from the threads I've read; but I doubt it.