I see it low side. I'm thinking more like 250. Suggests improvement, but not yet resolution.
We don't know _why_ the cars are on the lot. We need to see the activity along the pipeline.
I think that at 500 per week, we'd have been seeing some more configuration activity and reports of deliveries. Configuration requests and orders from suppliers anticipate production. They do have to get cars to stores, but Tesla doesn't have that many stores.
For comparison, in 2013Q1, Tesla sold 4,900 Model S. That's a little over 400 per week. That was an active quarter. Granted, employee deliveries are under NDA and there are many more Tesla owners now, so we'd expect a lower enthusiast quotient, but I still think that with the excitement around Model 3 there'd be more stories.
It is weird that the enthusiasm is quite low around there. It seems to be the opposite of the S launch. Maybe with the S, they put an NDA to prevent problems from leaking, but highly encouraged positives to help drive demand when they needed it. With the 3, they seem to have no NDA, since there weren't any major flaws to cover, but asked employees to keep quiet to keep demand down