What a crock. The entire purpose of this site is to push the author's books. She has obvious prejudices against many things, including purebred dogs and conformation showing. Much of the information posted is very misleading or incorrect. A mixed breed is not going to be "middle of the road" in terms of temperament, it is going to have the traits of the breeds in its makeup. Many mixed breeds are crosses of similar breeds, such as terrier x terrier, retriever x retriever (the poodle is a retriever), and so on, which certainly won't result in a "middle of the road" dog. Mixed breeds are also just as likely to have health problems. Cancer, for instance, isn't breed specific. Those that breed mixed breed dogs aren't people who do all of the proper health testing before breeding (CERF, OFA, etc. - not just going to the vet for a check-up), and don't eliminate dogs with such problems from their lines/neuter the dog they leave loose/whatever.

If you want real, correct information about a breed, go to the breed's official club website(s). You will find people who have spent decades working with the breed, lots of information on health and genetics, where shows are being held so that you can go meet some, and other important things. Clubs always want to help you learn and aren't trying to sell you anything. They'll be happy if you want to own one of their breed, but they'll also be truthful and let you know if the breed isn't right for you.