Other drummers have asked me about my (default) grip. Just flip a stick and catch it. That’s it: The brilliance of simplicity.
Note: I use a middle finger fulcrum as my “home position,” the index finger comes in to close the hand, add control and pressure, only when necessary (fast doubles, press rolls, etc.).
This allows me to utilize the rebound I get from the drums and cymbals, and to play with the least amount of effort.