I have my settings where I display 50 posts per page, so I'm not sure how many posts 4 pages would be for you, but I average around 35 posts per thread I created.
edit: I don't think the amount someone posts in the threads you create are correlated to how much people pay attention to you. I think it has a lot more to do with the contents itself. I have a thread with only 2 replies, and another with 98.