I don't know for sure, but I don't see how they could possibly make it the date it was preordered, that's ridiculous and probably illegal. You can't be asked to tick the clock on something that isn't even in your hands yet. Some orders will even get bumped back weeks.
I didn't even get the option to add AppleCare+ when ordering through the iPad app so I'm going to have to go into the Apple Store once the chaos dies down and add it...and hope like hell I don't drop it until then.
Applecare told me that it starts the day the phone was shipped.
I took this to Apple Support chat. The CSR confirmed that the warranty and AppleCare+ will begin today if you preordered and received your phone today.![]()