For the GD board, I would say anything that is not more then 2 day's old is what I would reply to.
As for the rest of the boards, I had a question that no one answered and thus it fell into the void of post. Someone did evently reply to the post, though by then I already knew what the problem was by then, (because I asked at gamedev), but I was thankful some one tried to do what they can on a post no one else seemed to be able to answer.