Is there software that would objectively measure who spoke most and who interrupted who most? If so, Bloggingheads should run such software as a matter of course and display the results alongside each conversation.
EDIT: it should also measure how often each participant allows the other to interrupt, versus simply raising their voice and ploughing on.
I'm willing to bet that such software would be very hard to develop.
Requiring 5 second pauses after speaking to allow for thought would be an interesting experiment.
Sweet, there's another Bloggingheads episode with Eliezer.
Bloggingheads: Robert Wright and Eliezer Yudkowsky: Science Saturday: Purposes and Futures