pretty much
Pretty much a backyard breeder can be someone who decides "oh my yorkie is cute lets mate her with a mini poodle so we can sell yorkie-poos for a good buck" or even "I'm going to breed my beagle to the neighbors beagle--but not do health testing, read books about it, think about both dogs behaviors ect".
Responsible breeders are professionals who know what they are doing--offer health garauntees, have done all research on both mother and father who have been reasearched as far as health, personality ect and probably have titles in different categories, they make the buyers do interviews and sign contracts, they do everything possible to make sure the young pups have all vaccinations and are sold at a decent age (not 6-7 weeks) ect...that's just some of the things I have gathered.......