All of those links recommend grains as part of a healthy diet. Usually as the second-biggest source of food after fruits and vegetables.

I really think the success people have (when they have success) with low-carb dieting is because they are cutting out half of a normal person's intake of calories when they remove carbohydrates.

That's a normal person, too - dunno how it works out when a person is getting carbohydrates through icing-covered donuts and not through, say, whole wheat bread, but it probably isn't good.

p.s. I love donuts.