I haven't read his book, but from watching his show, I think that he's primarily addressing issues that are PROBLEMS.
Like...if your dog wasn't only happy to see you, but was knocking everything out of your hands and being a big pest. Or, not just a healthy amount of energy, but "out of control" hyperness.
I think that since his JOB is working with dogs who have severe problems, often they can only be rehabilitated by going to extremes. And since he often works with OWNERS that are the CAUSE of the dog's problem, he is used to having to point out, "No, you don't just have a crazy and hyper dog...you have a dog that you have neglected to exercise properly" etc.
I think if your dog's behavior is not a problem for YOU and for the other people who are around him, then you know you're fine. But if others are regularly annoyed by excessive jumping, licking, barking, what have you....that's an alert that you do have a little problem, even if it doesn't bother YOU.
He also seems to work with a lot of larger breeds, and lets face it....a little yorkie jumping all over you, happy to see you, is not a problem...but a larger dog is! I don't correct my yorkies for being hyper and happy to see me, but the lab does get told "down!" You know?