Yes and these same people thought that pointing the clubface were you want the ball to end up and aiming your body were you want the ball to start was the correct way to hit a draw or a fade, which is wrong. Jack Nicholas was wrong, his method work because his body didn't do what his alignment did. He knew how to hit a fade because he spent countless hours hitting a fade. Telling other people how to do it, he doesn't have a clue what they need to feel to hit a fade. His method worked for him, but at impact the club is not were he aimed it, its in-between the target and his body line. If not, then he would hit every tree he ever tried to curve a ball around.
FEEL does not equate to what happens in the real world. Saying you accelerate doesn't mean you accelerate, and it can confuse people. Because they have no clue what accelerating through the ball means. Its like saying, ok i want you to pain this wall, to a person who has never painted before. When you come back you end up with a wall that is uneven and has tons of pain running down it.
Someone might feel like there getting there hands deep, or feel like they are maintaining there lag in the golf swing, when on video they might not. They might have to overexagerate by a lot to develop the correct motion and muscle memory
Butch is a damn good teacher, one of the best, what he does on a individual basis is amazing. But he knows as well as the best teachers is that each individual is different, and they have to search out there own feel to match the position they want. These general concepts of accelerating through the ball, which is physically incorrect as shown by scientific measurements, might only work for a select few to which is matches there feel in the golf swing.
You just contradicted yourself. If the club head is SLOWING down, then the clubhead is DEACCELERATING. Acceleration is the rate at which you move over time. If you are gaining speed, your accelerating. If you hit the cruise control on your car, you are not accelerating. If you are slowing down you are DEACCELERATING.
No one is saying quit on a shot, but the notion that you are physically accelerating through the ball is FALSE, and MISLEADING.
All the year's i have watched amateurs, i have never seen them quit on a full shot. They might not make a proper shoulder rotation in the backswing, or might not have good hip rotation. But i have NEVER seen an Amateur quit in a swing with there hands or the clubhead on a full shot. Honestly, most Amateurs have a problem with thinking they need to accelerate so they end up casting the club at the ball, causing a massive power loss. Now for finesse shots, that is a different story, but you don't teach acceleration, if all other things are correct, there is no need to.
For example, when My dad chips the ball by taking a long backswing and deaccelerates way to early. This is not a problem with his acceleration, its a problem that he takes a way to long backswing and compensates for it. So the fix wouldn't be, ACCELERATE, the fix is elsewhere.