To Big Grecian,
Your posting is utter rubbish !
I don't think that the Yanks would care less if there were a few biz jets operating under JAA and registered in a JAA state, but being based in the US.
Oh, wait a minute, it's already happening ! There are a few that I know of already which are based in the US, and have been for some time.
Not a problem for them, so why is it an issue in Europe ?
You would have to be brain dead to make an issue out of non EU reg Aircraft being based in Europe. It hasn't caused any problems (safety, or otherwise) for the last 20 years or so at least.