Several months ago some AOL search data became public and some people made the opportunity by analyzing among other things the click through rate by search ranking position.
http://www.earnersforum.com/showthread.php?t=3953
That information, if accurate, would be extremely useful, however I am a bit skeptical because the analysis shows only 54% of searches resulted in clicks.
When I search for something I almost always click at least one link. And I usually click several search results either by opening a site in a new tab/window or by clicking the back button after I've looked at a site so I can check out another site in the search results.
Does anyone else think a total 54% CTR is remarkably low?