I was looking at one of my sites in webmaster tools. I noticed that the impressions were running from 60 to 120 per day but that the number of clicks was a constant 5 per day. (under "Search queries")
The site was good when it was a frontpage site. I migrated to joomla about 1.5 years ago. Life intervened and I didn't do what should have been done.. ie clean up.. make sure all thelinks worked etc. SO, the site is less than stellar.
I've gotten back into things and started working on my sites again.
I'm wondering if this site fell into some type of google "Just give them 5 clicks a day and see what happens" program. I've looked at some of my other sites and the distribution of clicks seems a bit more random.
in GWT the "5" is actually "approximately 5". apparently you don't get enough clicks to step up to the next increment, which is probably "10". i would interpret that as you're getting a consistent 3-7 (perhaps) clicks every day and something like a 5% CTR.