While true, that statement is useless. It doesn't take into account the effect insulin has on the ability one has to actually take in those fewer calories. It also doesn't take into account metabolic pathways that allow one to eat more of certain kinds of foods than others.

The scientific literature is pretty clear (once you filter out the government propaganda that caused 300 million people to be unwitting participants in a dietetic experiment):

If you[1] want to loose weight and be healthier, screw calories and worry about insulin (full stop!)

There is nothing that more closely predicts insulin reaction than the number of carbs you are eating. Cut out all the simple carbs (which includes the bags of sugar we've cultivated as most fruit) and focus on fats, protein and very complex carbs and you will lose weight. More importantly, nothing has been shown to affect metabolic disorder[2] as positively.

I look at it like this: what do we use to fatten cattle up before we slaughter them? It's corn. Now look at every nutrition label to see what is in it. Is it surprising we are fat, too?

1. The body is incredibly complex. There are people who will respond better on other diets. So take any general study with a grain of salt and experiment on yourself to find what works!

2. High blood pressure, high cholesterol, heat disease, hypoglycemia, type 2 diabetes, gout, and others have all been lumped together into a disorder that strongly appears to be the result of hyperinsulenimia (eg too much insulin in the blood stream).