There is a simple test. Find 10 good players, have them shoot a draw shot with several shafts, they will tell you what works the easiest to get action on the cueball. I tried with many shafts, and of all of them the Revo is among the top few if not the top. One of the worst were shafts from two great cuemakers, Arthur and Samsara. I felt I lost a lot of power in the shot with their shafts. The guy that sold me the Arthur (which is the cue in my sig picture) even told me "I was tired or doing so much work for so little with the cue".
There is no direct comparison with pool, yet going from wood to composite materials made the items impart more power in all cases. Wood rackets to graphite and other material rackets to wider body ones. While how exactly they impart force to their balls in play is different in each case, the reason they do is the same. The most power will come from a wide stiff design, but at the expense of hit feel and touch. The best designs compromise both the least, thus the cost and engineering time in the equipment. If you throw something at a wooden wall, a concrete wall and a metal wall, I will guarantee you the rebound will be the most on the wall with the highest density and less deformity after the impact. That is what the carbon fiber shafts do, except in the case of pool, you are throwing the wall at the ball, but in physics, the results are the same. If you run into a car at 70mph or a car runs into you at the same speed, the damage will be the same.
The more the material deforms, by law of physics, the more energy transfer is lost to the object it contacts. If the impact is 1/1000th of a second or 1 second, it does not matter. It may matter to us, but not to the object. Here is something interesting about energy transfer, Newtons cradle, those hanging balls I'm sure we all played with at times. If you lift a ball and drop it, one ball at the other end bounces. If you raise two, then two balls will bounce. Now the fun part, if you raise one, then toss it at double the force, the other side balls still moves one ball but at double the distance, not two. How does it know that there is one ball at the other end moving twice as fast and not two at normal speed? So how does the cueball know there is force not lost even in the tiny contact, because it's not a human thinking about it, it just reacts in the only way it can, through laws of physics.