Originally Posted by DropShotArtist
Would you then say the below is incorrect?
The two statements are compatible, since after the torso rotation you would transfer more energy to the upper arm/shoulder and then the forearm/hand.
Please correct me if I'm wrong (and pardon term misuse): Torso, shoulder and upper arm are visibly one unit, but undergo mechanical "stress" individually in sequence, each time multiplying the force originated from the former. So, by the time your your energy builds up to the racquet, there's a healthy lag between hand and racquet.