Firefox (at least) will still send referrer info when you navigate to a https: site from encrypted Google. You can change this in about:config by changing network.http.sendSecureXSiteReferrer to false.

Source: http://kb.mozillazine.org/Network.http.sendSecureXSiteReferr...

This.

Its silly to rely on trusting the search engine provider to be secure, better be secure on the client side.