Learning is Social
Reading this article is a bit hard for someone who has devoted a great deal of time and energy to the preparation of training materials and the delivery of training classes. I don't think that I'm ready to just give up on training. I think there are ways, however, that we could incorporate more of the communities of practice elements into training sessions.
I have found some of the best moments of learning and "AHA!" is one the folks in workshops I lead discuss the topics amongst themselves and then bring thoughts back to the group. Same goes for my time spent in the classroom.