I don't disagree with the premises presented.
Testosterone, HGH, and insulin are the three important anabolic or muscle-building hormones. They work somewhat in dynamic tension with cortisol, which is a stress hormone. Each works in its own way to help you respond positively/negatively to resistance training. All come into play.
There is an hour-long window after weight training where you essentially have a "pass" to consume some high-glycemic-index carbs (e.g. sugars and other simple carbohydrates). Normally the consumption of an HGI carb will by definition spike your insulin which causes the blood glucose spike to be stored as fat. But in that window of time after weight training, the sugar actually can cause the insulin released to have a muscle-building rather than fat-building effect. Meanwhile the spike of sugar gets stored as readily-available glycogen rather than not-so-appealing fat. Something I used to do back when the logistics were right was to go from the gym (after lifting) about 2 blocks away to a smoothie place. I'd get a fruit-only (no added sugar) smoothie with good stuff like acai, blueberries, strawberries, and banana, along with some added whey protein. That's about as good as it gets. You're getting Nature's sugars along with some muscle-building whey, vitamins, minerals, and important phytonutrients with antioxidant properties.
The actual timing of the consumption of insulin-spiking carbs is the voodoo of it all. I don't know what's best, and there's competing literature on the subject. Most "experts" pushing their methods in the muscle magazines are on modern pharmaceuticals anyway, so I take their advice with a grain of sea salt. But this guy's formula certainly is within the realm of both reasonable and thoughtful. What is optimal is the only point of debate, and that probably varies by individual and initial conditions.
Another thing to consider is that *any* process which maintains or increases muscle mass will maintain or increase your basal metabolic rate. That means you burn more calories while sitting on your bum - as I did in spades for about the first 80% of my life. That gives you license to eat heartily, and that can be fun. It also means you're a warm heating blanket to your honey, who just might be glued to you all night.