I haven't been there in a while, but from what I remember... the INTJs there were great people, but several of them seemed intellectually deficient (but don't tell them I said that! You know how NTs get when you question their competence).
Do you know what was embarrassing, though? Because of the Fe/Fi conflict, I ended up often appearing to be the insensitive and detached one in the group, while everyone else was relating to some kind of Fi thing an INFP was posting that I just DID NOT GET.
They were some of the sweetest and rudest INTJs I've ever met, though. A lot of them were so nice to me, although I kept offending their sensibilities on accident. I guess they just cared about making me understand their point. And a couple of them were just amazingly... intense. There was one guy who just kept trying to bully me into accepting his viewpoint, but I just kept calmly refuting him... and at the end, he agreed with me, felt horrible for how aggressive he'd been, and thanked me for putting up with him. I met some great people on there, most of whom came to this forum sooner or later.
I was only on that forum at first because I had gotten mad over something that had happened here, and needed time to cool down before I could come back. I assumed a room full of INTJs would be a good place to learn how to calm down, as detached as those guys are supposed to be. Didn't work out quite like I planned, but it did work out pretty well. The forum got a little ridiculous when I noticed they started censoring the names of other forums, though... that's about the time when I stopped going back.