Quick: How many Fortune 500 CEOs are on Twitter? Would you believe 20? That's not a typo.
As of August 30, 2012, Fast Company reports that only 20 CEOs of top companies were using social media. (As themselves, at least. There's no way to measure how many chief executives have secret Twitter accounts under names like BuffyLvr72, but we hope it's hundreds.) Contributor and HooteSuite CEO Ryan Holmes points out that Larry Ellison just joined Twitter in June -- and tweeted once.