You only have to read it johnny to realize it is NOT a discussion of those limitations. (Doh!)
Cherry picking quotes from out of context articles won't help you. He is on record on several occasions discussing those specific limitations and suggesting that the results of those tests need to be analyzed in a much greater context than they usually are. He offers specific examples of the misinterpretation of the results and explains the reasons for those misconceptions.
If you want to educate yourself on the subject, please feel free, but don't expect to get a rebuttal to every random quote you find.