Simon Kuper wrote a very interesting counter-argument to the common assertion that social media is making us a post-literate society. From his piece How social media improved writing:

Before the internet, only professional writers wrote. […] Email kicked off an unprecedented expansion in writing. We’re now in the most literate age in history. I remember in 2003 asking someone, “What’s a blog?” By 2006, the analysis firm NM Incite had identified 36 million blogs worldwide; five years later, there were 173 million. Use of online social media rises every month. In fact, writing is overtaking speech as the most common form of interaction.

The fact that we write to each other more than we talk to each other comes with its own set of problems, of course, but Simon argues that all this texting and IM’ing and status updating is turning us into better writers. And he makes a lot of sense.