[scottjad]

I am quite sure that carbs is the most satiating macro, not fat. :) j/k

It's the energy density and palatability, not macronutrient content.

http://jn.nutrition.org/content/130/2/268.long

"In studies of satiation, it is important to match the palatability of the foods when they are compared. If it is not, the fact that one food tastes better than another could override any effects of the nutrient composition on amount consumed (Drewnowski 1998). In addition, to study the specific effects of macronutrients, they must be manipulated independently of energy density."

"These three studies indicate that the amount of fat in the diet did not influence satiation when the energy density was held constant."

"These results provide clear evidence that the energy density of food can affect satiation independently of macronutrient content and palatability."