What is important is the "tactile feel". When the trigger is pulled back far enough to cause the sear to release the striker, the point where the gun would fire (break point-boom), the slide then cycles and re-cocks the striker. As you release the trigger, the trigger jumps about 1/32 inch at reset. This is the tactile feel, the trigger jumping. You can feel this in your finger. At that point the trigger has reset and you can pull the trigger back, to fire the gun again. The fact that you can hear the reset does no good in a noisy, shooting environment. But since you can feel the reset, you know when to stop releasing the trigger, for reset, and can pull to fire again.

As previous posters stated, this eliminates wasted trigger movement and speeds up additional shots. You no longer have to nearly fully release the trigger, as you are not sure if the trigger has reset. The tactile feel lets you know exactly when the reset has occurred.

Bob