to be honest, Seperating p+f and p+c has worked for me, i've managed to get down to 7% bodyfat doing the whole carb/fat seperation route... wherelse before i'd only manage to get down to 10%
Although it seems to be working for me, everyone's different and I have to admit i don't see carb/fat seperation as a long term eating plan because you cant really not seperate carbs and fats all the time.. but for the most part, if you look at nature, carb rich foods tend to be low in fat and high fat foods tend to be low in carbs.. just food for though, pardon the pun