lucy24 - 9:36 pm on Mar 24, 2012 (gmt 0)
If people don't like it, they don't bookmark it, they don't print it out, they don't explore other parts of the website, and they don't come back.
In each case: How can g### tell?
There have been long discussions about bounce rates (corollary to "explore other parts of the website"). If you've got a specific question, and the question was answered on the first page you got to, doesn't that mean the page is good and the search results were reliable?
If the user needs to go to another page, the search engine has no way of knowing whether it's because they are interested in the site-- or simply that the anchor text sent out a stronger signal than the page that really has the information, so they started out on the wrong page.