Sorry for the confusion.
I guess one explanation is that Windows users are immensely many more, so the small portion of users who are generous enough to contribute in those kinds of forums will also be formed of more varied attitudes and skills.
No they're not. Read my comment again. I wasn't referring to proprietary forums owned by the corporation who makes the platform, but to generic public tech forums that aren't owned by any company.
Windows users tend to be way more helpful than Linux users over there.