Not my specialty, but I came across this comment on reported traffic figures a couple of days ago: http://www.techcrunch.com/2009/11/12/comscore-linkedin-twitt

Not my specialty, but I came across this comment on reported traffic figures a couple of days ago: http://www.techcrunch.com/2009/11/12/comscore-linkedin-twitter/#comment-3093148 http://www.techcrunch.com/2009/11/12/comscore-linkedin-twitt... It struck me as interesting; perhaps it's related to what you're looking at. About the overreporting: have you considered Google-caching ? I often just look at a cached page, which nicely highlights the words I searched for. Seems to me the page HTML is served from the Google cache, but images, ads, etc. come from the original sources.