Yes, the book recommends drinking a protein/recovery shake immediately following workouts, particularly high intensity workouts. The reason for the shake is, although your body is screaming nutrients/glucose stores to be replaced, you usually don't want to eat right after a workout. So, the author recommends drinking a lot of water, and using a recovery shake. The recovery shake is a combination of carbs and protein (using fruit/juice/protein).
Although most people do not workout at the intensity that would require the shake, as the author points out, i was looking into doing something along those lines, as my workouts do tend to go an hr and half or so. My goal is to trim down, get stronger. I do about a 10 min of cardio warmup, half hr of weight training (a very intense workout that is basically circuit training with no breaks), and about 45 min of cardio afterward. Intensity varies on the cardio stuff; usually I do not push myself on days where I'm also lifting.
The reason I bought the book, is two-fold - I wanted to learn about the Paleo diet, and also to learn how to *time* my meals (when and what to eat before/after workouts) to maximize my workouts, and not hit a wall, or get fatigued in the middle of a workout.
I'm still not sold on using a shake - but was just curious as to what protein powder would be considered 'paleo'.
Thanks for your input!