The forum which has been subjected to the most moderator intervention, to my knowledge, is D&D Legacy Discussion, the one I browse the most, and also the produced the post responsible for the new policy change regarding controvertial topic material. This may be why I haven't seen many posts other than "strictly business" by the moderators during my (admittedly short) time here.
If it makes a difference, I visit the D&D Legacy forum the second most of the forums I check out. I check out General the most, then D&D Legacy. I think that D&D Legacy is more committed to the older editions of D&D (obviously), and less open to even talk about changing something. I saw this a lot of the time when, say, Water Bob would open a discussion talking about mechanics (while admitting that he wasn't planning on changing his game, but that he wanted to know why the mechanics worked a certain way). Certain posters in the Legacy forum react pretty... condescendingly... to that type of post. I have one poster in mind in particular here, but he has a few other backers, and others who also respond rather... dismissively.
I think that General has its "problem posters" too, and they're usually involved in D&D edition wars (both sides... one poster even has "professional edition warrior" as his status). I think there's a less of a moderation to moderator input ratio in General when compared to Legacy for a couple of reasons: first, I think the moderators might be generally less interested in rehashing old game mechanics, and thus they don't contribute as much to the Legacy forum (where a few might be found in the 4e forum, or in General talking about entirely different systems); secondly, I think that while both forums have problem posters, the fact that General gets more traffic "waters down" the problem posters. Legacy has a few posters who are dismissive or condescending, though they tend to dominate thread after thread. In General, the big threads are dominated by the problem posters often enough, yes, but there is generally a plethora of smaller threads that aren't "infected" by the edition wars. In Legacy, you see the same problem posters popping into most of the threads that gain any traction (which in Legacy is a 2 or so pages, as compared to General's 20 to 40-page threads), egging people on.
At least, that's my perception. I'm sure that the moderators have more insight into this issue. I can only tell you what I see from keeping tabs on the pulse of both forums, and inform the moderators of my personal perceptions and assumptions. At any rate, just my two cents. As always, play what you like
