http://support.rockstargames.com/hc/en-us/articles/200150376-Delivery-times-for-R-Warehouse-ordersI've been trying to understand that myself.
They should have at least one for the US and one for the EU, so hopefully my package will get here soon enough.
Should be the 16th though.
Seems like they use avarto digital. They are in kentucky which means they are right next to the UPS hub.
Information about Avarto digitals adress.
http://start.cortera.com/company/research/k2k4owm4p/arvato-digital-services-llc/