Production did begin in March, but of course lead time for a car like this results in the first fully assembled model rolling off many weeks later.
Not many are aware of the difference between SOP and that of the first built examples rolling off assembly, as production of parts needs to take place before final assembly. That is where exotics and ultralux cars differ greatly from your average commuter/family car, in requiring higher lead time for production.
The white 500hs seen in early March, we're definitely pilot builds as I had believed.