Cold weather cracking during storage or shipping is a real concern for extreme performance tire. It's not like these tires are transport in heated containers, although tire company warehouses are well heated. Check out this link to a GM bulletin sent to their dealers, which is posted on the US National Highway Transportation Safety website.
https://static.nhtsa.gov/odi/tsbs/20...82862-5448.pdf
Be sure to scroll down to the photos of the cracking tire tread.
Waiting to have your tires shipped in warm weather may not be a bad idea.