Women tend to use online sites for socializing more than men do. Men tend to use online sites for information and how-to more than women do. Obviously that's not true across the board: women use online how-to sites all the time, and men do socialize online.
But in terms of leaving comments, it may just be that the women are more willing to form the core backbone of the QT community by socializing in the comments section.
Men on forums may tend to lurk more. There's nothing wrong with that. If you feel the talk is too "girly," whatever that means, feel free to start some testosterone-laden conversations and give your masculine opinion in the comments section.