The Oil Drum

http://www.beyondveg.com/cordain-l/grains-leg/grains-legumes-1a

Consequently, the human genome is most ideally adapted to those foods which were available to pre-agricultural man, namely lean muscle meats, limited fatty organ meats, and wild fruits and vegetables--but, significantly, not grains, legumes, dairy products, or the very high-fat carcasses of modern domesticated animals

meat and dairy products have been consitently linked to heart attack and cancer (also partly due to steroids, hormones and I suspect antibiotics that industrialised animals are fed) as outlined in your second link
http://www.tbkfitness.org/TBKdiet.html
Most of us today follow a diet containing a large amount of food which is not readily available in nature, and that must be highly processed to become edible. Our bodies were not made to handle such foods, and thus we suffer by dying of heart attacks, strokes, cancer, and complications from diabetes and osteoporosis.

http://www.mercola.com/article/insulin.htm
reads very much like the atkins diet and he is trying to sell his book.

however i agree cereals and legumes should not be the basis of a diet, you would definetly get malnutrition.

I advocate a BALANCED vegan diet for optimum health and using less resources

nuts, seeds, berries, fruits, vegetables and some legumes, root vegatables and rice if you can get it

 a potato based diet is not good, but that is not to say potatos are bad for you.

as an aside britains oldest man was vegan lived till 111, cycled to work till he was 100 and retired at 104.

if you would like to know more about the free organic food that is available to you then go to
www.pfaf.org
they have a database of 7000 plants that are edible
happy foraging.