Interesting analysis. For one thing, people share a *lot* more on mobile devices than on desktops or laptops. For another, Apple users on any device share a lot more than PC, Android or Blackberry users. But the really interesting thing is where you find different services on different classes of devices. iPhones are dominated by Facebook. iPads, however, are dominated by Pinterest.
ShareThis: Mobile vs Desktop: A Cross Device User Study
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