Used to work at an animal shelter, and I can count on one hand the number of cats we'd ever had that were anything other than "D(S/L)H (color and pattern)" or "(pattern) Siamese"
At the shelter I volunteered at, they'd occasionally get a purebred, but they'd still advertise them as DLH (or whatever) because they didn't want to attract the type of adopter who cares about the breed.