It's true. However, I'd give anything to be able to play as good as Rickie Fowler USED to play, and I'm sure most of us would.
I have the book and I'm almost through the second reading. For someone like me who has divots pointing left and hits a lot of pull-hooks, this is a great feeling, because suddenly the divots are straight or even a little right and I'm hitting pushes and draws. I don't care how goofy it looks if it lowers my handicap.
None of it is really new. Hank Haney's "slice cure" has advocated making the opposite loop to get the club coming on an inside path for a long time, though he never got into this much detail about how to do it. This is good because it shortens the backswing and relies more on torso and lower body movement to flatten the shaft coming down. Definitely something players in my boat should at least try.