I spoke from 1:30 to 2:45. When I started, I wasn't sure I had enough material, but we ran out of time. A common problem. The were a lot of questions and a good discussion. The audience was clearly made up of some people who had a good grasp on the concepts and were ready to discuss as well as some who were learning. I think the talk served both groups well, based on feedback I got after the talk. Here are the slide for my talk.