Specifically, 90%+ of all comments are of the "you're wrong, because..." variety. Note that there's nothing wrong with such comments: they make up a large part of any group's pub conversations as well, for example.
Yet there are other sentiments that are possibly underrepresented on HN: self-doubt, questions, or comments expanding on others' ideas come to mind.
None of these can obviously be categorised as singularity "male" or "female". And there isn't much shouting going on, even metaphorically. Yet it may, from time to time, be a good idea to step back and examine common assumptions,
It happens that the two styles are often categorized as female (agreeableness and pleasing others) and male (bluntly challenging). And indeed, in American society, men and women are in the broadest of terms socialized in those ways.
Personally, I wouldn't trade this norm for the world. I'm much too familiar with the Dale Carnegie crap of wrapping every point in senseless complements and false uncertainty to want to waste more energy on it than required. My own or anyone else's. I recognize that this preference leaves some people feeling uncomfortable. But that's my preference, and I am keenly aware that others may prefer differently approaches.
(EDIT: But read dang's comments instead. They're better than this.)