From my own experience and reading the forums here on BYC I would say the chicks will make it IF all goes perfectly. If nobody leaves the box in a cold place like a truck or loading dock, if there are no delays due to weather, if...
Disclaimer: The following is not meant as a criticism of anyone's decisions besides my own, but if I had heard this in January of last year I may have made a better decision!
I ordered last year for a very late February delivery and it was just this side of a complete disaster! I cried and still blame myself for being so impatient. My livelihood did not depend on getting ducklings and chicks that early, I should have waited until they had a better chance.