[jonlucc]

I think the problem here is that of BMI. While it is true that BMI is not always accurate as a measure of fitness, it usually is for people who go around saying that BMI doesn't mean anything. It is only incorrect for people who are extremely muscular, and those people know they're fit enough because they have other measures (like precise measures of body composition) to tell them.

So while it is true that not all calories are created equal, the people who most often seem to go around saying that seem to be the same people who refuse to pay attention to portion size and then bitch about not losing weight because they're only eating healthy foods.

[billmalarky]

>While it is true that BMI is not always accurate as a measure of fitness

You're right. I've never seen a fit person complain about the inaccuracy of BMI in anything other than a joking manner. It isn't precise, but it's "good enough" for the majority of people. It's a heuristic.

On the other hand, people who are clearly in poor shape love to scream up and down about how inaccurate BMI is at determining fitness levels. Ironic because BMI generally puts non-active people in a positive light. If we switched to body-fat percentage something tells me a lot of these folks would be clamoring to get BMI back since it under-reports people who have low enough mass to be not considered obese, but too high body fat to be healthy (thus are at greater risk for diabetes etc).