Some people can use wrist action effectively to get more cue speed into the ball with less apparent effort. However, it is cue speed at impact, and not acceleration, that really matters; although, acceleration the whole time before impact is what creates the speed. For more info (including a video) on these topics, see:Dr. Dave---A what is your take on this???A lot of the lower capability players think they must use excessive CB velocity in order to get a lot of backspin. What they lack is the dexterity in their wrist to snap forward through impact so that the cue-stick is moving rather slowly at impact, while accelerating rapidly. The separation between cue-stick velocity at impact and cue-stick acceleration at impact is what allows big draw with soft speeds.
http://billiards.colostate.edu/threads/stroke.html#acceleration
http://billiards.colostate.edu/threads/draw.html#physics
http://billiards.colostate.edu/threads/draw.html#physics
Regards,
Dave