But there is another aspect missing, the fact that it also depends on context being present. It's not a problem to read the email because the mind is also following the flow of the sentence. But if you were to take every word and randomly misplace it, then it becomes more challenging.

Anyway, the same concept the email exposes is true for many other things, like have you ever read a title of a movie or a book with weird fonts, like an A not looking like an A because some artist thought to get cleaver to make an A look fancy? Imagine the NASA logo with the A's not having the horizontal bar, or the old 1980's logo for the TV show "Airwolf" with the center of the world cut out. The mind fills in the blanks, replacing missing letters or oddly shaped letters into something it knows should be there.

Further into this, in the realm of Robotics, a few years ago computer scientists discovered that the human eye (or area of brain that deals with sight) seem to have it's own processing areas that fills in details. Like... for instance, when you enter a room you don't have to look at all the room to see the basic details of the room... the eye/brain puts things together.

This is a cool email :-)