Yes, though not exactly forums, but people whos actually playing WoW seems to be having fun in game amirite!
It is like every other thing in life. If you are happy with something you bought, like a TV you won't very often run down to the store again and yell that the new TV was AWESOME! But if it doesn't work you'll be sure to tell them that you are not happy. Happy WoWers won't be coming very often to forums to say that they have an awesome time in game. They would be more likely to say that in game instead. Not saying we all are here to complain, not at all, but the likelyness to get happy threads are less than the more "change this, that sucks" because that's how we humans behave.
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Back in the day we would easily pay 12 bucks a month for access to a forum where we could talk shit about it all day! Complainers nowadays, casuals!