The literature I have read indicates that the smooth coat genetic variant is dominant, whereas the rough coat variant is homozygous recessive. It is like Geoni Banner said... if you only have genetic rough coats in a breeding program you will only breed rough coats--it is impossible to get a smooth coat from 2 rough coated parents. You can, however, get rough coats from two smooth coat parents (assuming they are heterozygous).
You can see how this dominant/recessive coat gene plays out because of the abundance of rough coated BCs. If you have ever owned a smooth coat, you would experience the repeated crazy question/comments "What kind of dog is that?" and "Oh, I didn't know they could have short hair."
I would speculate that density of coat, as well as lengths of rough coats can be explained how the allelic differences are expressed phenotypically, which could be an interaction between gene and environment.
In any case, I am not looking for a dog that strikes my fancy in terms of looks! I'm looking for the (apparently harder to find) form of a BC coat that will better fit our lifestyle and environment over the next 15+ years. I don't think that's unreasonable.
Was really hoping to not elicit any strong reactions like those I have read in the forums in previous posts where people get very judgmental about someone wanting a type of "look" in a BC, and the ensuing comments about how BCs are not bred for looks, etc.
What I was hoping for was if someone had seen a breeder that had any smooth coats, they would refer me to them.