Don't judge all PC forums based on the children over at Hard forums. Any of the better sites will have better Forums, try Anandtech or ARS technica. They don't have as many teenagers taking out their angst on others there.
True, but Anandtech and ARS are true nerds; those at [H] are young nerds with angst, trash talking about their xbox points or how well they've OCed their cpu. I'd know, I usually have a good ol' time over there

Granted, not in a childish way, just for some general info/bantering.
Specifically, their threads have far more detail about nearly everything that MR doesn't (i.e. specifics regarding hardware, oc'ing, video cards, monitors/LCD's, etc. that are far superior in detail to our MR forums). I frequent different forums for different needs; MR mostly just to banter about the latest Apple gossip, if I really want detailed info, I go to [H], Anand, or ARS.
I find most of the people over there on [H], Anand, or ARS are more knowledgable than the people here. Of course, most of the PC people I know, including myself, know much more about computers, operating systems, and hardware than the typical Mac user.
Of course, Mac users don't build their systems from scratch, or anything else similar that you'd need that specific knowledge for.