Join the club. I picked my car up on Thursday. I have had it connected to a very strong WiFi signal (Orbi in the garage) and plugged in to the charger, but my firmware is still 25 versions behind the latest according to
TesliFi.
I've tried using the hotspot on my iPhone, other family member's WiFi, and even parked outside the Service Center connected to their WiFi to see if I can speed the delivery along. None of the tips mentioned in my searches worked for me, but I am not sure they really work for anyone.
25 versions add up to a lot of cool features I am missing out on, so I hope it doesn't take weeks. It's hard to be patient when many of the youtubers say the best thing about the Model 3 is the OTA updates, and I can't have them.