Be very careful with this one folks. The studies I have seen from Trackman may not be accurate because all it is saying is that with a 0 or 5 degree "upswing" the ball will go farther. However, they did not say what loft they were testing or if they were even using the same driver. It seemed to me that they were just creating launch angle.
The trackman is a very accurate machine and I like the fact that it can track the ball and the clubhead. I would like to see more testing with different driver lofts to see if swinging "up" is better or is more loft better.
As usual, premier player-teacher-fitter Jeff Hull cuts right through the 'seems as if' that most of us have never even thought about.