It's going very well. The kids and I revised the schedule last night, because they question everything. (Life with teens, right?) Anyway, we came up with a schedule that says that if they get up by 9, no chores at all and then the later they get up, the more chores they have. I think it's fair. They both got up a little after 10, which is reasonable, I think, for teenagers. They do have a biological need to go to sleep later and get up later. So today, they have a smaller chore time than they are used to and only have to do general cleaning, picking up and putting away for 5 minutes. They also have assigned chores like loading and unloading the dishwasher that need to be done the same as always and are not affected, but giving them a little break like this makes them happy and I'm still getting some picking up and straightening done, so I'm okay with it. I really don't forsee them very often getting up early enough to have no chores, though it could happen I guess. :-)
Now we need to add back in the "mom has to exercise or the kids don't have to do school" clause in our school schedule because I have really been slacking in my exercise and this is a way to help me do it. Although, on second thought, I think that can wait until January, don't you?