Don't bother to wait at the UPS CC. I was there at 10 AM this morning and they told me that they don't have sorters working there on Saturdays and there's no way they could locate packages arrived this morning. I was furious and called UPS when I got home.
The UPS supervisor told me that regardless of whether you requested a hold at the CC, all iPhones are being delivered today as quickly as they can. This was an arrangement between Apple and UPS. Now I'm just sitting at home waiting for the UPS delivery.
I really hope this is the case!