it's an old debate...
You can see how the pole is going already. Most of the wise participants of this board know that, on the break... speed is key, not mass.
Think of it this way...
How far can you throw a two pound object?
How far can you throw a four pound object?
How far can you throw a twenty pound object?
You can see where I'm going with this...
With speed, comes accuracy, especially when on the break. It's fundamental balistics, just like an asteroid hitting a planet, or a "high velocity" bullet striking it's target.
Edit: sorry, had to add... depends on the game. Different breaks for different games.