This is good. I'd heard the 5-10lbs for hypothyroidism, which is great ammo, but what about for metabolism differences in general? The argument that people just have incredibly "fast" or "slow" metabolisms that allow some to consume 3x the food of others with identical results. The "genes are not your destiny" article didn't hit on any specific numbers and was very vague regarding exactly how much more effort these people with "bad genes" would have to undertake. Can someone burn 1000 calories while another identical individual (sans some "guhnetics") burn 3000? Not sure if there's any research on this.