You think they are pulling the plus sizes from their warehouse and sending them UPS and sending the other models from their warehouse Fedex????
My 6s rose gold has the exact same notification this morning. It says UPS but if I click the link it directs to FedEx and isn't found yet. So I don't think whether it's a 6s or 6s+ has much to do with it. I'm just excited it says "shipped" now.