Last quarter we took delivery of a W/W P3D at EOQ (end of September). Until then, I was refreshing this page and the tesla account page on a daily basis looking for a VIN in the source.
In reality, unless they find a configuration match for an existing car, it seems like its pushed to EOQ to maximize deliveries. More specifically, east coast gets theirs around December 15, and deliveries literally move from east to west with CA bay area being last 25th-31st. Even more specifically (yeah I was really OCD about refreshing), you'll see exterior color batches w/black interior, followed by white interior show up on your local tesla.com inventory site.
It's a bit frustrating to wait, especially near the end, as you might see inventory vehicles show up on the east coast when you havent even gotten your VIN on the west coast. It's probably best (i.e. healthiest) to set your expectation for delivery right before new years - and if you get it sooner, it'll be a pleasant surprise!