That would be nice, our snakes could make some killer babies. (that sounded wierd lol.)
Its possible they did breed the SDs to the dwarfs for that reason, but I think most of the breeders working with them just wanted to produce SD morphs since they'ld be highly marketable. I wish they hadn't done that, it would have been nice to see more pure line of SDs.
Both of mine are 100% pure - parents were CH and they have darken up a bit, I noticed that my female has a slightly larger head than my male perhaps the head size is possibly a gender thing?