Batteries. One bad batch does not spoil the MY.
It may just be as simple as this. Bad batch. I have no reason to believe it isn't. That's certainly what I'm hearing from the SC manager. He said he's attempting to keep a dozen batteries at the SC 'til they cull through the bad ones in peoples cars.
This isn't much of an update since my car isn't at the SC yet.
It HAS been a very interesting experience. A learning experience for certain. Trust me, it's different than reading about issues on TMC when it first hits you that it's YOUR car that wont start. Honestly, after my initial shock that my "perfect"car wouldn't drive; I was proud that I'm a part of the troubleshooting. Seriously, that's how I feel. Our goal even as we drive this amazingly powerful, and fast luxury car is to get Gen III to the masses. Working this stuff out is part of the process.
I was also glad to experience roadside assistance. Very competent, I knew they were there to help me. The Columbus Service Center manager got in touch with me immediately after he heard my car was coming in. I can't say enough about how good that made me feel. I don't know how Tesla keeps hiring these awesome people but kudos to whoever gets it done. The manager at the Columbus SC was communicating with me as late as 10PM last night. Not because I bugged him either. He just REALLY cares.
The only weak link (other than the obvious offending battery :wink

was the towing. We seriously need to tweak this. Apparently Tesla contracts with Allstate. They (Allstate) have all the contact with the towers. The first tow guy had no idea how to tow a Tesla whatsoever with the exception of knowing he needed a flatbed. He couldn't get the car on the truck and didn't have any of the necessary equipment. Very nice guy, just couldn't get it done. The second guy had access to the necessary equipment but didn't bring it. At about 10PM (I called roadside at about 245PM) it was getting late and he said he'd have to wait about 2 hours to get the stuff he needed delivered so I reluctantly gave him the key fob and went home. It wasn't easy to leave. I beat him to death with all of the towing instructions I could give him. Including both of us laying down under the car with a flashlight and identifying the tow holes. As well as making certain he knew how to tie it down once it got on the truck, 2x4 bracing instructions etc... The bottom line is that these guys should have all this info when they arrive. Specifically, if the parking brake is engaged and cannot be released they need to be aware that they'll need special equipment. That they wont be able to put the car in neutral etc...
FWIW: I started the upgrade with a full standard charge minus about 10 miles of driving. I was parked in the exact same spot (lots of 3G bars) as my last update. Did not get any 12 volt warning. The update appeared normal with the scheduling or install now option, the 2 minute countdown and then the window saying that the update was in progress. Not sure where yobigd20 got that silliness about not following instructions. I'm a "checklist" guy. I do these things exactly according to instructions and I always double check before selecting anything. I've never seen, and frankly can't imagine that I would have missed anything about being plugged in.
Hoping it's just a bad 12 volt. I'll update as soon as I hear anything.