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 J&J Is Curiously Absent From Twitter -- Does That Matter? Only Three of Its 19 Megabrands Have Presence in U.S. By Cotton Delo and Jack Neff, Published on October 28, 2013 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. Become a Member Already a member? Log in.