>This means the workers were gaming their timing system with fake pizzas.

Or it meant the person cutting and boxing your order was falling behind.

At least ~15 years ago, the way Domino's timer works is that when the cook puts the order in the oven, they hit a button. ~8 minutes later it says it's ready, which is how long it takes to get through the oven. That was the only input for carryout, delivery had another for when the driver left.

If it was 30% of the time, I'd guess you requested something unusual like "no garlic spray" where the mistake happened or was noticed after the computer says your order is ready, then had to remake it. Or most of the times it was just a few minutes and somebody was boxing it.