Turing's rapid Nazi Enigma code-breaking secret revealed

I don't see that this adds any more than is already in the previous four submissions of this story:

http://news.ycombinator.com/item?id=3878007

http://news.ycombinator.com/item?id=3866664

http://news.ycombinator.com/item?id=3863134 <- This has some discussion

http://news.ycombinator.com/item?id=3862973