This is a very complicated question, and while I understand why they would use that percentage figure, I think it confuses the issue if you look into it more de

This is a very complicated question, and while I understand why they would use that percentage figure, I think it confuses the issue if you look into it more deeply for exactly the reason you stated. It is true that most of the money changes in hands where you get farther in the hand because pots grow geometrically as you continue on in the hand. However, the importance of decisions becomes more important as well, and most of the edge a skilled player will have over a weaker player comes about from those larger pots based on decisions made later in the hand.