I was thinking the same thing...if 6-9 months is from today and they are able to nail the most optimistic delivery schedule Elon gave to suppliers (from earnings transcript):
"So, when we place parts orders with our suppliers, we've told them 1,000 a week in July, 2,000 a week in August, and 4,000 a week in September. These are parts orders. Then the parts need to arrive. They need to be turned into a car. And the car needs to be delivered to customers."
At best, that is 4k produced in July, 8k produced in August and 16k produced in September, but most likely a month later. I'm guessing there are tens of thousands of West Coast single motor orders along with the pipeline for Stores and Test Drives. Elon just tweeted to anyone not and employee or a California Model S/X owner wanting dual motors that they are going to burn through the overhang of initial deliveries and by the time they would have gotten to the rest of us, more options will be available. Wouldn't worry too much.