There's one thing I find weird though.
With the high number of leaks recently which come mainly from Asian sources, the leaked parts would likely be production units and not prototypes from Cupertino right?
Then they would require to have the regulatory FCC stuff written somewhere.
iPhone 4/4S:
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It has "Assembled in China", FCC ID and FCC/CE logos which are all legally required on all production units AFAIK.
Now if you look at the most recent leak, which you would guess is a production unit given the timing and all related internal parts that are brand new and not assembled.
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Now where are the regulatory writings on that one? Would Apple produce an illegal phone? I don't think so.
They are probably parts from before mass production. They have to test the parts beforehand y'know...Once they test it and it's up to their standards (and they like the design), they finish up the device, gain approval, and mass produce the parts with the regulatory stuff on it.