Proform, if you want to get into this debate, you're more than welcome. You can ask your God, Mo Pinel, the answer to this question, if you'd like. I'm sure he'll give you the correct answer.
The farther you place weight from the center of your track, the longer the ball will go longer. So, if you place weight on your positive axis point/PAP, the ball will go longer/give you the most length. If you place weight closer to your track, the ball will roll earlier/earliest.
So, if you put the pin on your PAP, along with the ending CG, the ball will go the longest. As you move the pin and ending CG away from your PAP, towards your track, the ball starts to roll earlier.
Now let's talk about what roll means. Roll means the ball rolling in a forward/end over end motion,i.e. Chris Barnes. When you turn the ball, the ball has side rotation, i.e. Pete Weber.
Different weights and/or core positions will either help maintain your side rotation or inhibit the side rotation, making the ball start to change direction and/or lose it's side rotation, going into more of a forward roll.
This is called "precession".
The more positive side weight you have in the ball, or the closer the pin and the ending CG is to your PAP, the longer the ball will delay it's precession going into a forward roll. Thus, the later the ball will roll.
The less side weight, or the farther the pin and ending CG is from your PAP, the sooner the ball will enter it's precession and/or change direction into a forward roll. Hence, the earlier the ball will roll.
Now if you don't believe me or understand this, there's nothing I can say to help you. So, why don't you go ask Mo..!! =:^D