I have always found this topic to be interesting. Based on this article about how many students are taking online classes, online enrollment has gone up 17.2%.  Overall enrollment has been going down.  The stigma associated with Online Learning has stayed through this growth. Students in online courses seem to give more negative evaluations than in-person.  Maybe that does not speak to the medium, but rather to the course development, faculty or courses that are chosen to be offered online.  

Dave Dick