I'd noticed that too. Given that Jobs seems to have had the juice to get away with signficant and brazen securities fraud, he may have been in a fairly secure position to say 'no' to PRISM. But for that matter Twitter's CEOs, much less mighty figures, also seem to have been able to say 'no' too. Or maybe the rickety state of Apple's Web services (MobileMe and all that) had something to do with it...
