Doesn't look like something I'd do, no way. Prioritizing your muscles is one thing, but when your priority is taking away from your other muscles, I can't see that being a good thing. The author has a ton of awesome training articles for sure, but I don't like this one.
Day 1: Shoulder Workout #1
Day 2: Biceps/Triceps
Day 3: OFF
Day 4: Chest/Back
Day 5: Legs/Abs
Day 6: Shoulder Workout #2
Day 7: OFF
Just looking at it, I can see that your chest and triceps workouts will be nonexistant. If you are to stick with a program like this, I don't imagine doing ANY flat presses for chest being advisable. You'll tear a rotator for certain. I also see that you don't have any real time to recover your delts because you "blast" them on Day 1, they get hit again hard doing chest on Day 4, then Day 6 again...With one day to recouperate before blasting them all over again on Day 1. For me to do that, I'd need to "enhance my recovery
I also remember seeing the EMG post showing any cable laterals to be inferior to anything else for recruitment of muscle fibers.
It is duel factor theory. It has a 4 week block of volume, followed by a drastically cut volume and frequency block to recover from. Too much for me!