This reminds me of this:

http://michaelgr.com/2008/12/29/overestimating-the-cia/

The Kryptos sculpture has been there for all to see for many years, and the man who designed it thought it would be decrypted in months.. Yet it still hasn't been fully decoded, including by the NSA and CIA (part of it publicly was, so we know that if they did they would probably tell us).

This tells me that they're probably very good at some things, but that we also shouldn't overestimate them (the hollywood effect).