That's awfully condescending and presumptuous, don't you think? I've taken zero Coursera courses (but did take the original AI course with Norvig and Thrun), but have been busy taking max credit loads at school, TAing, becoming the lead dev at a startup, and starting my own startup. I'm sure a ton of people here can say something similar. MOOCs are great--as highlighted by the article--and I intend to take more. But there are other worthy things to do too. "The good is the enemy of the best."