I got a call confirming my delivery next Tuesday, and the guy told me I'd be getting the A/S tires (yessss!!!). It's still on its way here but he knew already. I forgot to ask him how he knew so I called back in and spoke to another person. She said based on the VIN she knew it would have A/S tires. I asked her how she knew and whether it was encoded in the VIN somehow and she just said it's an internal thing they can see.
If you're curious and want to know, try calling and asking them- it sounds like they can look it up now (internally). I personally think they're switching over completely based on how many people either live in harsh winter climates like myself or may find themselves driving through them at some point. Heck, people in Hawaii are getting the A/S tires for gods sake and I don't know of much snow cover there except in the mountains.
She also confirmed that they are the special Tesla tires with the accoustic foam so we'll see how loud it is. This tells me that it's possible some of the major tire sellers may start carrying at least the non-accoustic foam version soon?