This article had confused references and was pretty deficient overall.

Like the statement

  Protein was big in Paleolithic times, with up to 30% of the diet being
  meat -- much more than is recommended today, says Eaton.

where even Cordain "The Paleo Diet" says "a little more than half - 55%"
(pg 22) -- and other references cite higher.

Philip Thrift
http://www.geocities.com/paleofitness