A bit of it is here:
http://www.marksdailyapple.com/life-expectancy-hunter-gatherer/#axzz24p8ZdZs
Here is a good place to ask questions of paleo-knowledgeable people: http://paleohacks.com
This analysis does not mention cancer, and cancer's identification as a "modern disease" is greatly confounded by the fact that civilization has brought both increases in lifespan (revealing cancer; breast cancer rates in women are far higher above age 60 than below) and great increases in the ability to detect cancer (and thus link deaths to it). An excellent discussion of these issues is found in Siddhartha Mukherjee's Cancer, the Emperor of All Maladies.
You stated that when "hunter-gatherers switch to eating modern diets they start getting these diseases at high rates." What evidence is there for this claim in particular for cancer?
I recently came out against paleo in the open thread, and realized that I probably haven't yet heard the strongest arguments in favor of a paleo diet. So, what are said arguments?
EDIT: Or more generally, why should I eat less carbohydrates and more protein / fat?