From the conversations I've had at the warehouse in Seattle, my understanding is that the response to the mystery cases was so large that they decided to compile as much as they could from unpaid or unassigned wines on hand.
Due to the constraints Jon placed on diversity and relative deals, it was taking a long time to assemble and equalize the cases. I don't know how many cases were promised or sold, but they got over 7000 requests.
I'll let you know what kind of grab bag I scored when I'm allowed to pick it up. Odds are that I already own at least one. (See-The Birthday Problem)