Has your order come yet?
I ordered through Costco last night. (64G SG iP6+ ATT) I've been watching their iPhone page for over a week, but it always said 'COMING SOON', then out of nowhere it read "ADD TO CART".
However, this morning the rep told me she doesn't think the phone is actually in stock, but they might get a shipment soon. For some reason I thought Costco was only selling them when they were actually in stock.