"Actually, that really isn't true, the majority of dogs in the northeast are stray pickups, followed closely by owner surrender because of relocation. Any behavioral issues we see from shelter dogs are simply a lack of some basic training, nothing more. And the health issues are from neglect or lack of basic care. The myth that the southern dogs are better in temperament is just that, a myth, I can't begin to tell you the amount of dogs I see with behavioral issues that were trucked up from southern shelters."
Sorry, my quote button doesn't work anymore.
What I'm seeing is what all shelters and rescues in our area are seeing. I suspect being closer to major urban areas, you see different things. Yes, almost all of the local dogs coming in to rescue are strays. But as I said, generally with serious behavioral issues. The last local dog my friend got in was an 8 yr old JRT that someone tied to her doorknob and tried to run away from. Dog aggressive (goes after larger dogs, and then gets is butt whooped; has needed vet visits), human aggressive (the owners reason for dumping; safe around quiet adults, will bite if startled), not housebroken (and goes in his crate if crated), and put punctures in my friend's cat that required a vet visit. How many people are looking to adopt that? Meanwhile, she brought in five adolescent or young adult dogs from WV the other day. They won't be temperment tested until closer to when they are ready to be adopted (yes, she hangs on to them for a while to fairly evalute health and temperment), but so far, all crate quietly and show no signs of dog aggression or resource guarding. I'd bet money all of those dogs will be successfully placed before the JRT.
I don't know of any rescue/shelter in our area that deals with only local dogs. The transports from WV, Tennessee and Georgia that come up generally bring dogs for several different rescues and humane societies. They all take in whatever local dogs are available, and adopt them out if they are safe, but our rescues would be pretty much empty if no other dogs were brought in. And then what options do we leave people with? You can bet not all are going to do the research and waiting time to get a dog from a responsible breeder. The local pet store and BYBs would be getting far more business.
While I don't agree with everything she says, Sue Sternberg's book Successful Dog Adoption has a pretty interesting (and, from what I've seen, accurate) discussion about what types of dogs tend to get put into rescue in different parts of the country.