I have hatched all shipped eggs so far this year, AND it's my first times ever incubating! The first batch 4 hatched out if 12, the second batch 7 hatched out of 17 (I had a second set in with these, I'll let you know about those in a minute). This is my third batch, so far, 10 out of 12 are doing SO good & we are 14 days in (they are silver laced barnvelders, I'm so excited!!)
Now the set in with the second batch, I believe it is something with the sellers eggs... The first set was very porous (insides literally leaking through the shell) & only 4 of 18 even started to develop. They replaced them, and the second batch i only see 2 are starting but I'm going to check again in a few days & I'm praying they make it!
So... All of that to say, I guess it really depends on the quality of the eggs & perhaps even the handling of the eggs in shipment. I haven't candled any before I put them in, I let them sit 24 hours with large end up & in they go
Good luck & happy hatching! I can't wait to see your results