I think that "compressed deceleration" is demonstrated in some of the videos you posted. You're incredibly fast on your drawstroke but you seem to start slowing the extension about 2/3's of the way to full extension. I just didn't know what to call it...
I can see where the "doorbell" analogy could apply there.
As language often structures thought...I'll be adding this concept ,"compressed deceleration", to my dry fire practice.
Great info as always folks.