About 90% of the population of Brazil uses messaging apps, three-quarters of Russians, and half of Britons, according to mobile consultancy Tyntec. WhatsApp alone is on more than 95% of all smartphones in Spain. The power users and early adopters of these apps, the ones you're most likely to see tapping their thumbs over a tiny screen, are under 25.
http://www.theguardian.com/technology/2013/nov/10/teenagers-messenger-apps-facebook-exodus











