Take a close look at this screen capture from Twitter. Note the exact same tweets being posted over and over again using multiple identities, with photos that look like they were clipped from the ads of dating services.
We saw this exact same pattern during the failed coup plot against Iran last year.
This proves that the flood of tweets about Adam Gadahn's arrest is a staged propaganda event. He is being promoted as this major terror arrest even though the reality is that he has done nothing at all except pose for video cameras!
UPDATE: Whatever was being planned with "Emmanuel Gadahn" appears to have collapsed. The Pakistanis are now saying that the man they arrested is not Adam Gadahn (Pearlman), leaving CNN and the rest of the news networks to clean the egg off of their faces following the constant pounding about "American Al Qaeda" (nudge nudge wink wink). Given the earlier certitude, a genuine mistake seems unlikely. Given the obvious propaganda push, I think that whatever was being planned had the plug pulled.