Point taken and that is why I'm so interested in what a professional nutrition doctorate has to say.
However, as "aruanan" posted and has been long proven there is a difference in how the body uses those macro-nutrients. There is a difference in carbs (simple vs complex); there is a difference in fats (healthy vs unhealthy - think olive oil compared to lard); smaller difference in protein (amino acids) unless they have a bad protein to fat ratio. Think lean meats.
I agree with him that lean protein is the best for our ancient metabolism and that processed carbs are not so good. "Clean" fats are good; bad fats contribute to our triclyceride counts.
C'mon, apples bad? Really? Twinkies good, really?
Let me end my input by stating the mediterranean and Alaskan Intuit diets produce the longest living people. Why? Because of fish diets that include pure protein and healthy fats (Omega 3 acids). If you want to argue that med peoples eat lots of pasta (carbs), remember they also drink lots of red wine, which has resveratrol that is now known to be one of the best anti-oxidants ever.
Thinking I will have another glass of red wine...haha! Or better yet, some vodka to thin my blood...and kill more brain cells so I will make even less since next time around - har! Best.
(Six weeks late to the thread, but) I have found after repeated experiments that if I stick to an Atkins diet, I lose about 2 lbs a week. If I add one apple... ONE APPLE to that diet I will gain back a pound. It's happened about four times. It's tragic because I love apples.