As long as the temps aren't to cold or to hot they will be fine. I however might reach out to Josh's frogs and voice your unhappiness with the shipping price versus the service you are receiving and see what they can do for you. My Experience is USPS generally hits close to the mark and may have it slated for Fri at the latest, but may still show up Tuesday or Wednesday.

Your Springs should be fine. Just open the container when you receive it and look for survivors. They are tiny tiny tiny white things. You can fill the container with water (Springs are to light to break the surface tension of the water) and see how many lost to the surface. Sometimes it may take a few hours from when they get inside your warm house for them to snap out of it and wake up.