Danny Crichton at Techcrunch makes some good points on the difficulty of getting people to engage in online education due to lack of time, motivation, and work-related payoffs:

What the world is discovering is that humans are going to be humans (a discovery we seem to make a lot in startup-landia). We failed to ensure that motivation and primacy were built-in to these new products, and in the process, failed to get adults to engage with education in the way that universities traditionally can.