Can you lecture through Twitter?

The question is intriguing, and recently David Shiffman taught a marine bycatch lecture entirely on Twitter. It seems like an excellent way to reach a broad audience and a novel use of social media. I would be interested to know how the participants felt about the content detail. Universities have been diminishing the classroom experience, in favor of online courses, but this Twitter exercise maintains contact with the instructor (as opposed to pre-recorded videocasts with discussion boards monitored by a TA).