I think that Tom Venuto's perspective is interesting, but I think he is missing part of the big picture. I'm not sure what his qualifications are, but what he is saying directly goes against what I and others have experienced, as well as what I have learned in my years of fitness instructor and nutrition training. Disclaimer - I don't have a university degree in any of this stuff, but I do have 25 years of taking college level courses for interest and to maintain my certifications.
If you reduce calories, you reduce body weight (not necessarily body fat). If you add calories, you add body weight (not necessarily lean muscle mass). I think he is confusing reducing weight on the scale with losing fat, and confusing adding weight on the scale with adding muscle. To lose or add the right type of tissue, I think you need the correct balance of nutrients built into your target calorie intake. Your calorie intake and expenditure through activity determine what your body will weigh (relative to your own personal physiology). The cleanliness of your diet and the relative proportions of macronutrients will determine how much fat and muscle your body will have. If you change any of these variables your body will change.
Stebby