[ghaff]

As an interviewee, I'm going to be exhausted after an hour on mic and talking about whatever random things come to mind--which are probably mostly random digressions that aren't very interesting. I have been taped for longer than that--with a break or two--but with the intent that the footage was going to be heavily edited.

I'm not even in the efficiency "play it at 2x" camp. But I pretty much have zero interest in hearing two or more people randomly ramble on. The fact that NPR/NPR-like podcasts and radio shows tend to have segments on even 1 hour shows probably says something about what pros find works best.

(I'm also a fan of shorter conference presentations although at large conferences, I appreciate that there are logistical issues associated with moving people between rooms too frequently.)