Interesting article... But in fact, at the end of the article, he's actually explaining there's just nothing like KI but he's just using the other one's movement.
For example, if your partner reaches for your wrist and you wait until he grabs you before you start to turn and throw, you will end up with someone's body hanging on to your arm as you try to throw. If, instead, you start the turn and throw before he actually grabs you, you will be able to lead his energy. In order to grab you, if you are already moving, your partner will have to track your movements and follow you. If he is intent on grabbing you, you will be able to lead his ki by just staying slightly ahead of his grab. Then you simply lead the movement into any convenient aikido form.