I had no trouble at all reading the letter either - but I do agree that if the words were longer it would be a tad more difficult without context.

Just like you can often figure out what a word means by the sentence/paragraph around it, you can usually figure out a mixed up word the same way.

This brings up related thing though...

When it's really really late, and I'm trying to finish up a book that seems to drag out the end I have been know to skip over entire words, sometimes sentences, and still know what's going on.

Do you think this is the brain working in the same way as understanding jumbled words?