He in turn is pulling these examples from Entrepreneur magazine, as linked in his blog. To be honest there isn't a lot of analysis here beyond a vague description of the campaign. But look at the total number of followers - 6,000 for Subway, 4,700 for McDonald's, 38,000 for Dunkin' Donuts? And have you looked at what those accounts post? As Aaron explained yesterday, this is almost a lesson in how NOT to use Twitter, right?
