I just left Cascade Mtn in Portage, WI, they don't think they will be open until January now. They are really concerned about the season.
Welch is considering staying closed this upcoming weekend to make as much snow as they can, and leave it in piles so it doesn't deteriorate as quickly. Then they could hopefully have as much snow as possible between Christmas and New Years for while the kids are on break, and they make the real money.
Bigger problem, is that pushing things back like this, will cause a glut in new equipment sales for this year, leaving extra inventory next year, and the year after. Additionally this could kill the Beer League racing that is barely hanging on at a lot of places (Welch and Wild barely can justify it anymore).