It doesn't give any basis or fact for a balanced diet at all. The only insight it gives is a genetic standpoint. Starch is metabolized into sugar, which has no nutritional value at all. So no, Sara, they actually aren't getting something from it other than maybe some way to gain weight and have small, quick bursts of energy and then crash. I would think for you, and your agility dogs, that would be a nightmare unless it was right before or right after a hard workout.
Yeah, this article gives proof on a genetic level. It gives NO basis or proof on how we should feed a nutritional or balanced diet. Zero.