I agree with most of what he has to say. He says a lot of important things. A couple things I did differently, and I would still do differently. I used to give Ryan a Gatorade before the game started, and I don't really see anything wrong with that. The other point he mentioned is that parents should be involved in helping choose the right academic school. I would argue that parents meeting the coaches and providing input to their son on the coaches is not a bad thing either, since you would most likely provide a different perspective than your child. Ultimately, it is the kids' decision, and I would only provide input.
In the end, Ryan ended up where he did based on his decisions. He wanted to go to CSI and pitch for his current PC, and he decided to go sign with Purdue for next season. I agree that you should let the kids make their decisions, but I also think you should provide some guidance.