Actually, while that figure is better, it's probably still cooked by the methods they use. The Japanese set up facilities and outsourced everything this side of assembly. I worked on many of the contracts for component suppliers. When we asked what the model was up in Detroit, a number of them responded that they didn't have the model because Detroit produced massive numbers of these components, still, themselves, in house.
I don't pretend to be an expert - my information is sort of "side-door"(as opposed to back door), but I was referring to the additional jobs created by all of the component manufacturers and distribution centers that are required to serve the Japanese JIT model. While Detroit obviously supports a lot of subsidiary industry and supply chain manufacturing, also, they don't (or didn't) have as much out sourcing as the Japanese model. And those jobs, for the most part, are US jobs. Very few companies were able to sorce foreign and still meet the demands of the JIT supply chain contract.