I used to let all shipped eggs sit out to rest for 18-24 hours before setting them. Now, I set them in the turner in the incubator as soon as I get them unpacked and then I just leave them alone for 3 days. No turning, nothing.. I figure that considering they may not be the freshest, I want to start them asap. Sitting upright inside or outside of the bator, they're still resting, why not get a head start on the growing

I think it depends on the Silkie when it comes to difficulty in hatching. For example, I bought 18 eggs from x breeder last year, had great development, air cells were perfect and hatched 11, only 1 vaulted skull. This year I ordered 18 more from the same breeder, the same breeder birds, the same time of year..the air cells were all over the place, I ended up with 4 live chicks and 2 have vaulted skulls and I think vaulted skulls was the major factor in the other 4 that made it to lockdown not hatching.
In my experience, Silkies usually hatch a day early, and if they have trouble, it will be during hatch at pipping and zipping. IF they have vaulted skulls and can pip, they may still not be able to zip at all or if they do get started they can't turn fully. Again, this is just my experience. .