I've found that the opposite is true. Eggs cut early take a longer time for the baby to crawl out of the egg than if they were just left alone.

I believe this is due to the internal temperature being lowered when the lid is removed for a prolonged period of time, even inside a walk in incubator. Eggs that are getting ready to hatch create their own heat. Eggs over time can increase the internal temperature of their egg container which is lost when the lid is opened for cutting (and also concurrent checkups to see how the babies are doing).

I cut all my python clutches and then leave the babies to come out on their own. I cut at day 52 and most are out of their eggs on day 53-54. I've cut ball python eggs as early as day 47 (by accident) and that clutch came out on day 61. I've noticed that eggs cut in around day 50 hatch on day 57-58.

Corey