I believe Mills and Marshall are similar in their thinking. This is one of Marshall "3 Laws":
"To achieve their maximum release velocities, pitchers must apply straight-line force from my 'ready' position throught release to the end of their deceleration phase."
Sounds alot like Mills momentum pitching to me:
"a new type of delivery used in the wind-up, unlike today's pitching deliveries, emphasizes a step back toward second base, no balance position, while the pitcher focuses on driving his his entire body away from the rubber into a stride at least 100% of his height."
It is as if they believe if a pitcher could take a running start from 2nd base he could throw significantly harder. Completely misplaced focus. Linear energy accounts for as little as 10% of velocity (per a velocity study done by the NPA). Even if you could run from CF to the mound to throw, you are talking about what 3-5 mph gain versus a static start? Rotational energy per the same study accounted for up to 85% of velocity (with the potential energy of the leg lift making up what's left. Why not focus on the biggest percentange of velocity generation?
A study done in the Journal of biomechanics showed that the only noticeable difference between youth/high school/college and professional pitchers was the timing of their max pelvis rotation and max torso rotation. Stride length, time that max pelvic rotation is achieved, max external rotation, etc were all very similar but professional pitchers separated their pelvic rotation from their torso rotation by 18% (in terms of the timing of their entire motion being 100%). High school and youth pitchers exhibited only an 11% difference.