It's also fact that dozens if not 100s of people have been carton hatching and having higher hatch rates on average under certain circumstances. Hatchery conditions are not home incubator conditions and just because one way works doesn't mean another way doesn't work. I also specifically...
That would be a matter of opinion. I have much better hatches from shipped eggs when left in the carton during hatching. It seems to make it easier for them to position for pipping and I don't get as many pips in weird places.
Getting wet over night could harm them but if it wasn't for long...