WOW! I know it depends on incubation temps and humidity. I've seen some posts of redfoots hatched at 60 days and Sulcatas at 90. Interesting time differences. I'm sure the longer in the egg the healthier they are.
It depends too long has its complications as well as to fast. Nice medium is always my safe option. So far ive had 100% hatch rate. So im doing something right!