This is what i meant by logical thinking in our part ( no flame)
When carbs are consumed the body creates an insilin spike. When carbs are consumed with fat the insulin spike is significantly less, but at the same time stable~.
For example if you have a blood glucose meter you can experiment youself. Eat any high gi carb wait till it settles then take a reading; the meter will show high spike. Now preceeding that reading immediatly eat some greasy sausage or a couple teaspoon of flax...take another reading....Glucose will be stable. Makes sence?
I think that part of the reason why carbs and fat are not good to eat together is because it is truly USELESS combo, we as BB combine specific foods to optimize anablism. With carbs we want protein. Fat does have its place, but when eating big meals consisting of High carb and high protein, it would be in your best interest to keep fat as low as possible, to optimize muscle growth.
For these reasons fat plays a key role in dieting(keeping insulin low). afterall its all about insulin manipulation.