Interesting. Similarly, I just learned that most of the live oaks landscapers use around here (SE NC) come from Ga/Fla - and they don't tend to spread long/low branches like our natives. There is a guy here who has started a tree farm dedicated to growing "heirloom" live oaks. He gathers acorns from well-known (and not so well known) big oaks and grows them from seed. Part of his promise to current tree owners is that if they lose the tree due to storm or disease, he'll get them a descendant. He's been growing for a few years, I think is a year away from being able to start selling to developers/landscapers. I'm going to be interested to see if the idea works, but if I were planting a live oak in my yard I'd much prefer to have one out of a local tree that proved successful.