I'm afraid not.

There was no “Twitter Revolution” going on in Iran [5]. Dell, which was said to be having a huge success selling on Twitter, was actually doing only about 0.005% of their total sales via Twitter [6].

KLM is doing a bit better: About 0.1% of their revenues via social media [7]. But nothing, really, to write home about.

But Zappos is a big social media marketing success, right? Let’s listen to what their CEO Tony Hsieh has to say: “Our goal is to build personal, emotional connections with people, whether they are customers, employees, or our vendors/business partners. Twitter (for example) just happens to be one way to do it, but so is the telephone. Nobody cites Zappos as a "telephone success story", so I think it's a bit strange to cite Zappos as a "social media" success story" [8].