I mean hell, I'm still trying to figure out which stacked grip is which in this debate.
See this graphic I don't particularly care for, but it works. But that's mainly because I don't know anyone who uses the "stacked" vs the "power" they are demonstrating here. Most everyone uses the "power" here and calls it stacked. In my experience anyways.
The 2 finger grip its demonstrating a lot of people use. It doesn't allow for proper wrist movement during the throw and puts pressure on your hand in really odd ways.
The stacked grip (power in the graphic) is the normal grip which a lot of people use.
They generally use the two finger or some version of a stacked.
Both have their benefits
I actually have a very specific throw I do where I use a two finger fan grip, which isn't even shown in this graphic.
The stacked style grips promote good wrist movement and allow you to use your hand to properly apply power into the disc with how your joints are designed to work.
While the two finger does not.
So, to draw back to the original topic of the thread.
"serving the pizza" (which is the dumbest thing i've ever heard)
If you're throwing a stacked style grip, you do not want to try and "serve the pizza" like scott is talking about.
If you're throwing a 2 finger style grip with your palm up to the plate. You need to serve the pizza.
Otherwise you'll be rolling your wrist and creating OAT.
The debate is about where the pads of the fingers sit, not so much which finger is stacked over the other. Pads of the fingers pressed on the rim vs. pads of the fingers pressed up against the flight plate. Sheep is saying that pads on the rim results in less strain on the joints of the hand.
I don't think people really put much thought into it honestly.
I hate my brain works this way and I wish I could just throw discs watch go woosh. But I'm thinking about far more than that.
Simply putting a disc in the 2 finger grip and grabbing the disc and flexing it back into your hand like it would see stress in the throw, you should be able to feel the strain all throughout your hand into your wrist just doing that.