I also saw this documentary two weekends ago. I found it really interesting because not too long before, I read "Why We Get Fat" by Gary Taubes who argues the exact opposite (no fruits, more meat and vegs). Anyway, I enjoyed the documentary a lot because I do think we're not meant to have a lot of dairy as we grow older and I am on the fence on how I feel about meats in our diets. I think we should eat more natural meat, but definitely less of it. Therefore I have been trying to learn a lot more vegetarian / vegan recipes.
Anyway, due to watching the documentary, I found that my local Whole Foods is putting on a free Engine 2 diet 28 day challenge for free. You join and say you're going to go on the E2 diet for 28 days and you get free cooking classes, and health education about eating more plants. I joined in on that and now i'm on day 4 of the Engine 2 diet. I am trying it out and I have to say, it has been kind of difficult to get in all my protein. ( I am training for a 10K in 8 weeks. ) Our next cooking class should address this though so maybe that will help.