I have seen this with all the letters messed up but never with numbers. I am amazed that the human brain is not only able to unscramble it but get faster at reading it as you go.
It makes me wonder why we have not done more brain mapping. One would think that if the brain can simply look at one of these and unscramble it there should be a way to relate this to learning a new language . Imagine being able to just pick up and read a new language in seconds. It has to be possible.