So they are going to support it, but you can't get your coins until 1 Jan. 2018. Sort of an odd response, but better than "All your bitcoincash belongs to us!"
They said they will list it "by" Jan 1st. So it could be anytime in between.
I think they want to see what happens in November with BTC first. That and they want to make sure the BitcoinABC protocol and code is not buggy.