I would also bet that the craftsman will show less overt progress as he works. He will appear to be moving slower, but will in fact complete the three to requirements faster. And in the initial phase, in particular, the craftsman may take a lot more time. The speed will be shown not over the initial design, but over the whole production cycle.
By the way, I think these skills can be acquired and even taught. They just aren't yet being taught afaik.