I disagree - I don't fit in perfectly with the typical HN demographic (I'm black and I'm not a programmer), and I've made comments that disagree with consensus, and so long as I've been able to back up those comments, I've gotten upvotes.
Contrast that with Reddit where I can link to all kinds of supporting studies but if it's contrary to the hivemind's opinion, I'll get downvoted to oblivion while someone with a differing opinion based on something he heard from his best friend's sister's boyfriend's brother's girlfriend will get an upvote for an unsupported opinion that aligns with the group.
Of course that's just anecdotal experience on my part, so perhaps you're correct and this comment should be downvoted :)