I have nothing against GW and I wish him well, but what kind of guarantee do I have of his claim that he doesn't log my search queries? (I realize that the "Referer" thing is indeed verifiable.)
He also wrote a blog post on how to change nginx's defaults to not log IP and user agent: http://www.gabrielweinberg.com/blog/2010/11/how-to-not-log-p...