An interesting article by Reiserer et al. concludes that there is no significant difference in student collaboration between videoconferencing and face-to-face. Both favour, it seems, the same learning styles and learning outcomes are not affected by the medium.
The use of collaboration scripts looks like having a beneficial effect on students, but I also liked the support via structured content. Using both in a VC session could produce a good learning experience to the students.
Collaboration scripts are step-by-step instructions on how to collaborate on a project, structured content on the other hand could mean providing students with materials to discuss, such as a statistical graph or a review text of a theory.
I have long been of the opinion that studio videoconferencing supports the same pedagogic approach as face-to-face but differs quite a lot from online pedagogy. I discuss this in greater detail in a forthcoming article on interactive teaching by VC.