> > "...it's really like they can eat anything and the weight drops off of
> them. The rules of calorie physics just don't seem to apply..."
>
> This is absolutely fascinating to me and is the only explanation for how it
> is possible when taking up a paleo diet to increase fat and calorie intake
> yet lose weight.

There could be other reasons. For example, many paleo people say they
feel more energetic. It is easily possible that paleo diets just burn
a little
more energy. A small difference adds up pretty fast. Fat seems to burn
cleaner than sugar, maybe allowing higher energy use with less down time.