Here's the article.
Don't pay a premium for 'premium' pet food
It does in fact seem that their rating is based completely on the price of the food when they say "the best deal we saw on dry dog food was a 50-pound bag of Ol' Roy at Walmart with a unit price of 34 cents per pound. At the higher end of the price range was a 4.5-pound bag of Purina Chef Michael's Rotisserie Chicken flavor, at PetSmart for $2.22 a pound—more than six times as much."
They could have named just about any other food and it wouldn't have blipped my radar....but COME ON!! Ol' Roy??
Oh man, I just saw where they consulted with and quoted a vet/small animal nutritionist in this article. She's the assistant dean at a veterinary college. Now that's discouraging.
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He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion. -- Author Unknown