Some really good points there Adam - I think the key point you make, is where on a forum you have to trail through pages of posts to find an answer, but on custom sites, like SO and yahoo answers, what the user is looking for is much easier to find as it's usually right there at the top.
Anyway - what do you think? Do you agree? Disagree?
I'd love to hear what @Mike and @Kier think too - will we see something like this in XF soon?