> The trick is, meat is actually fairly low in calories and protein (meat) is extremely filling.

What? Meat, from fish to chicken to beef, is one of the most caloric foods, rivaled only by nuts and oils. Meat usually is high in fat, it's very hard for it to be low-calorie. The weight loss doesn't come from a low-calorie diet, but from forced ketosis due to prolonged lack of glucose.

As others hace said, it's the carb deprivation that makes you lose weight, you could easily do a vegetarian diet and lose the same or more weight without abusing fat and rising your bad cholesterol.