DJB retort on this is now stuff of crypto hall of fame: https://gist.github.com/tarcieri/6347417#file-gistfile1-txt

> --- Cryptographers are certainly not responsible for this superstitious nonsense. Think about this for a moment: whoever wrote the /dev/random manual page seems to simultaneously believe that

   (1) we can't figure out how to deterministically expand one 256-bit
       /dev/random output into an endless stream of unpredictable keys
       (this is what we need from urandom), but

   (2) we _can_ figure out how to use a single key to safely encrypt
       many messages (this is what we need from SSL, PGP, etc.).

For a cryptographer this doesn't even pass the laugh test. --- <