You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Nielsen, ComScore Pitted in Ratings Race Both Are Courting Big Brands in Effort to Make Online Measurement Talk in TV terms By Jack Neff, Published on April 09, 2012 2 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.