The watch-it links opens up activation instructions, not keyboard usage tips...
Downloading the 67 MB movie you learn that if you are typing a word and the phone makes a suggestion to use a different word, you choose the alternative word by not tapping on it. Instead you tap the space bar. If you tap the suggested word, you end up not using it.
Revolutionary? Don't know.
Intelligent? No.
Illogical? Ding, ding, ding. We have a winner!