yes, i have clicked on adwords quite a bit....its usually out of frustration with google's listings. I have found in the last 6 months or so google has been so "off the mark" with their listings and the only way to get anything that is relevant is to click on their adwords.

But that being said, I have switched about 95% of my searching to yahoo now, their results always tend to be way more relevant.

cheers,
Luke