The full fat people had more grehlin levels in their blood. In fact, the grehlin levels were the correct amounts for how many calories the person thought they were consuming, not how many they actually consumed. So, it can be quite complicated.
Explains why diet coke makes you feel less hungry if you don't think about it being diet coke. Well, that and the whole caffeine-being-an-appetite-suppressant thing.
Yes, there are things that affect your feeling of satiety other than raw calories in/out. They are complicated and I don't claim to be an expert on them. However, the total amount of energy that you can take in is capped at the amount of calories you eat. If you eat fewer calories than you burn then you will lose weight. There is really no argument against this.
The 0.267m device weighs just 0.467kg and measures a mere 0.0066m in thickness.
Happy now?
The hardest part of climbing the ladder of success is getting through the crowd at the bottom.