Interesting because I am now mixing up my own eating plan taking parts from RC, GI and Dukan! Mainly GI.
I use the RC portion pots if I have muesli or rice for instance, and I always have protein for breakfast as Dukan but they don't allow fruit so I look to GI for that! I don't have nuts because they are high fat.
Bit of a muddle. I say I don't calorie count but after years of controlling my weight doing that I do it automatically!!