I think it would be the same, but most dogs from shelters and rescues ARE healthy. Thousands of healthy animals are put to sleep EVERY single day in shelters all over this country. It's better to save a life, rather than buy because you're going to end up spending way more on a bought dog. Dogs from petstores and backyard breeds are prone to have MORE health problems and behavior issues.

If someone doesn't know how to properly care for a pet, then that's the only reason why they shouldn't get one because shelter pets are for anyone. Pound puppies(and any other kid of animal) make the best pets IMO.