Updated: Exclusive: A Look at Google Ad Planner Data Vs. Comscore

When Google Ad Planner came out back in June, I immediately thought of Comscore - and I was not alone. Many in the marketing industry thought that Google's product would be a "Comscore killer," and when I noted as much in my coverage, Gian Fulgoni, Comscore's chair, shot back in a comment to my post:

Hi John: Before celebrating the availability of these products from Google, I think it would… » Full Story on John Battelle's Searchblog