I also preordered from MacMall for a Space Gray 32GB model. The actual product page still looks exactly the same with a "mid-November" shipping date and text that says the product normally ships in around 8 days.
But I just got an email from them that says this:
"This is to inform you that there has been a change in the delivery date for the orders that you placed on November 6, 2015 (Order# ********):
Previous estimated arrival date:
November 18, 2015 - November 25, 2015
New estimated arrival date:
December 3, 2015 - December 10, 2015
Please note that you will only be billed for items that have shipped. You will receive corresponding shipment information as the remainder of your order ships. To check the status of your order, you can go to Order status by clicking here."
Needless to say, I'm not happy. Obviously this is all speculation since they don't even have the products themselves yet or know of an actual release date, but the main reason I ordered was a consideration of a few days later shipping vs not having to pay any taxes. If the arrival date is now possibly a MONTH after when Apple could have it to me, I'd rather pay a little more to have it at release. But of course, as soon as I ordered they did a preauthorization charge so I have to wait at least a few days for that to even drop off before I could cancel the order and again, it's possible Apple preorders could have been announced or it could even be on sale by then and the money will still be tied up.