I was just looking over my own GWT reports while answering a similar question in another thread - www.webmasterworld.com/webmaster/4529110.htm - and I noticed that my "top web pages", excluding images, all have a solid CTR from search according to the reports. The CTR from search for each individual page drops the further down the page I go.
Does Google now rate a page "best" when it gets a good CTR in search, which is something titles influence a great deal, or is it just coincidence that my best pages, according to GWT, all have an outstanding CTR?
Is Google likely to display your page more often if it has been getting the click more often? I don't remember it being that way before, I distinctly remember seeing pages with lots of impressions have a very low CTR and vice versa.