Everyone is having issues with a huge increase in shipping and the holidays adding even more to it. Georgia is probably having additional issues because of the Senate runoff election and they're giving priority (I believe) to ballots. Things were done that resulted in the post office slowing down. It's all factual, but I'll probably be accused of being political if I mention them, so I'll leave that reading as an exercise for you. I know personally that we haven't bought a single present in store this year. Amazon has been pretty solid, but we live near a major distribution hub and often get shipments next day.
