tl;dr The Churchill-Turing Thesis is true from the OP's subjective experience, too. http://en.wikipedia.org/wiki/Church%E2%80%93Turing_thesis
"Every insufficiently random symmetric-key scheme can be successfully cryptanalyzed given a sufficiently long ciphertext."
Of course an entirely different matter is whether said scheme can be feasibly cryptanalyzed, but I digress.
I think that just involved dead Nazis.