Mine originally just said Friday. At some point it updated to add "by end of day", yesterday it changed back to simply say "Friday" and this AM it changed to "by 10:30am". May be it means nothing or maybe it means they're changing it based on current load and expectations of how they'll be breaking out the workload on release day. Yes, that's possible. I had always blown these release days as "yeah right, UPS & FedEx eat shipments like this for breakfast", but last year my UPS driver (good guy, we order lots from Amazon and see him often) said that they needed to add drivers on in most larger areas just to cover the iPhone release. Still boggles my mind a bit.