Interesting information...Correct... though packing eggs properly for optimal shock absorption that doesn't reach the eggs helps tremendously, shipping is always a crapshoot...
Is it prudent to set shipped eggs upright? Who says? Damages done in shipping that affect the actual viability are *not* reversible... if the chalazae becomes separated from the yolk (not something that can be determined by air cell damages) it will never develop, no matter how much or what way it is tried...
IMO, upright setting and minimal tilting actually causes more issues than help... ones I have laid down from the beginning have done just as well or better than ones upright...
I have a hen who lays eggs with side air cells. It's the oddest thing. They always hatch.
I also have had shipped eggs with ugly air cell saddles that hatch. I'm beginning to think successful hatching has more to do with CAM development/damage than air cell issues...