There were a lot of invites sent out in the 2/22 batch and most have not received their VINs yet with exception from a small handful. There are also many others from earlier batches that have yet to receive a VIN as well. I would love to get my Model 3 within the 6 week delivery window that was specified when I ordered but with the way that current production rates look at the moment I’d be happy to get mine before the end of April. Given this I do not expect any invites to go out this week and if they do it would be a pretty small group.
I don't think so, it'd be foolish if they fail to achieve that rate. At best they hope to make 2500/week. So they will first make them and simply fullfil existing orders faster and then send invites with shorter delivery times.
They are definitely sending out invite based on delivery center capacity. San Diego online waiter are already able to configure. I doubt they will hit 2500 by end of the March, if they can hit 2000+ that will be great.