No need for math. I just wanted to know if when you use the words TRUE DI if you mean they have a mathematical advantage over the house. You can claim someone is a TRUE DI but mean that in a deceptive way(in the air and land it in the target zones gently kissing the back wall)
Many people can influence the dice with a very good looking shot. Just like you have described, however, it's not enough to gain an advantage.