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 Boston Consulting Takes On Bain In Brand Buzz Business, Names iPhone No. 1 Boston Consulting Group Takes on Bain's Net Promoter Score in Battle of Buzz Barometers By Jack Neff, Published on December 02, 2013 5 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.