Paleo/primal/caveman diets.. a scientists perspective

Great video of a scientists perspective of the Paleo/primal/caveman diets. (from the TED talks series)

http://www.youtube.com/watch?v=BMOjVYgYaG8

NOTE: I personally dont follow these diets, as I have found a style of eating that works well for me and do not feel a need to change. If you have success with this diet, that is fantastic and you should continue. I do hear some outrageous claims and thought it would be good to understand the perspective of actual science.