That‘s terrible news, my sympathies. I wonder whether they’ve sold more of the big storage versions than they expected. My maxed out (other than ram) came a lot earlier than expected, although it was originally down for 21-28th.
If I now play with the online ordering, the stock models are “in stock” and any other variation I add says ships in 3-5 days. But as soon as I select over 1Tb of ssd, it moves out to 2-3 weeks.
In reality, I’m guessing most people ordering by adding to the top spec variation is going to be selecting at least 1Tb as an absolute minimum, more likely 2-4 if not 8.