I am getting an M3P. I've been told that all Oct build date units have the bigger battery (MY22 specs) and all the SR+ on the same shipment have the larger battery but the old 0-100. So ours should have the same "new" battery. I say "new" as I've seen comments since the first MY21 refresh that it comes with an 82kWh battery, despite Tesla saying it doesn't. Either way, it would be nice, but didn't influence my decision. I was going to buy second hand but the heat pump was the big thing for me, other updates also nice of course. I'd rather have a new one by Christmas, than one with a 22 build date in March. I assumed you were getting SR+ based on the post subject.
Of course, Vedaprime's comment above suggests the Dealer was telling porkies. Who knows? With Tesla it seems you can only trust what you can see and touch once it arrives. Until then it's theoretical?
I also read an article yesterday that some are landing in the US with missing USB ports. Anyone here experienced that yet?