For me the most exciting talk, with the most new content, was by Vincent Rivasseau. He is at Orsay. That means the top Paris center for physics theory. We should get some slight acquaintance with the person, as well as his current research. http://www.rivasseau.com/index.html Born in 1955 making him now in mid-50s. His homepage is extremely concise and free of rhetoric. He says only what is necessary. His research is described as follows: http://www.rivasseau.com/2.html "I am a mathematical physicist specialist of constructive quantum field theory and renormalization. I have worked to apply this theory especially to the problem of interacting Fermions in condensed matter. Since 2004 I study quantum field theory on noncommutative space-time and more recently the new group field theory approaches to quantum gravity." That's all. For me what stands out is the recent focus on "the new group field theory approaches to quantum gravity". ==================== Vincent Rivasseau's talk at the Perimeter conference is here: http://pirsa.org/09110049/ One thing I find delightful is that this is someone who has started only in the past two years to explore Spin Foam models and GFT, and in this talk he is already reinterpreting the formalism and proposing major changes in how to do things. It's refreshing to watch: encouraging, stimulating---and his suggestions being based on his experience with condensed matter and noncommutative field theory are possibly enlightening. He helps one to see things a different way. So I got a good impression of how physics might be done at Orsay. It appears that right now in France there are a remarkable number of strong 4d QG people---at Marseille and Orsay of course, but also other places too, like Lyon, Tours, Montpellier. It's beginning to look like a "critical mass" concentration.