what about epic muscle gayning? what are your advices on that?
drugs
While this is reasonable advice in a general sense, it is not absolute. There are other factors to consider... such as ones individual metabolism, and the state of that metabolism over the period of the diet. The more/longer you diet the more your body will try to compensate by lowering your metabolic rate. In some cases it will also blunt the output of your thyroid gland, which negates the effectives of your diet.
I would add to your list, and say that other good tips are to do some cardio first thing on an empty stomach, and if you find yourself in sticking points, rev up the amount of calories you are eating for a couple of days to get your metabolism back in order, then start dropping calories again...
Taking a cyclical approach to dieting is best IMO.
Metabolism is dependent on total caloric intake, no doubt. But the 3 rules remain true. IMO, cardio is unessential, so is doing it on an empty stomach. Everything else is bro science as far as I know.
Hmm....if that is the case then WL advice is not optimal. One's natural metabolic rate, and one's metabolic rate in whatever phase of the diet that they are in are too unpredictable to just offer such blanket advice. One should use the mirror as their guide, and make adjustments as needed.
Adjustment of calories to achieve a certain rate of weight loss accommodates for whatever lowering of metabolism might occur. However, for most people, this lowering isn't nearly as severe as claimed.
hold the presses!!!
caloric intake < needed calories = weight loss
Give the man a Nobel prize.
I'm not talking about weight loss, I'm always talking about (close to) optimal body composition. After all, this is a bodybuilding board. I'm old but that has not slipped my mind yet.

If his approach works for him then great. I would just point out that there are too many variables with metabolic rate/hormones/rate of digestion etc, to just offer blanket advice to everyone and pass it off like gospel truth.
The real simple thing to take away from what I am saying... is be pragmatic...give your dieting/training program a fair chance, keep tabs on your physique, and make adjustments to your diet/training/supplement/drug intake as needed.
I for one have found that my metabolism flatlines, if I don't eat frequently, or don't do cardio...both of which seem to correct the problem. Then again, I also have a naturally slow/average metabolism, and almost never find myself needing more then 2-3k calories a day. I weigh a reasonably lean 250.
I agree with the pragmatic approach, this is what this thread is all about. Everything else is merely a matter of convenience.
I guess thats part of the debate; WL will most certainly argue that caloric restriction under the guidelines he has posted is by far the most important variable.
He should take it from here 
Yes, as numerous studies have shown.