> Virtually every _controlled_ study shows that metabolic differences between adults are within a margin of +/- 15%, with essentially no way to eat the same amount of calories as a 200lb person and stay at 465lbs. Not least of which because your basal metabolic rate is much higher at that weight.

That sound a bit wrong to me. Fat needs energy to maintain itself? Isn't it just an energy store? If you're 465lbs with the same muscle percentage as someone 200lbs maybe that's how it works, but no one at 465lbs has less than 15/20% body fat.