I ordered a P100D on December 11, and it was confirmed with a "G" VIN on Monday morning of this week. (Delivery scheduled for late February-March.) I was all set to ask them to change it (I'd somehow managed to get a little worked up about it for no real reason), but as of this morning, it had changed over to an H on its own. It does seem like this will sort itself out if people just wait it out.