I recently recall something that Coy Dickenson wrote regarding this. A lot of the dogs that passed through his hands were based off Carver blood and he said Mr. Carver said most of his dogs were slow starters or late starters, something like that. Coy believed Mr. Carver meant that they were slow to start working real hard in a show, and not that they turned on late. I have heard that many Aligator/Rufus dogs are slow to get going and that blood is, in-part, in-bred off Satin Lady which was supposedly Carvers Ironhead x Carvers Black Beauty.