All y'all need to do is read the forums and you'll have a clear understanding of the current status of VINs and deliveries. It's actually hard to miss.
Are you referring to people reserving in December or actually ordering in December? If you're referring to the people who actually ordered in December, they're on schedule to receive them this month or in April....it's already happening.
I stopped by the dealership today. They have 2 December orders there waiting to be delivered. I'm sure yours is one of them. They've delivered 3 total so far.