Hey Tom, you seem to be in the know about things, but I was told by a Disney Reservations CM, that if I would buy my tickets now for my December 2017 trip...I would technically get them at the cheaper price, BUT when December 2017 got here and I used them I would have to pay the difference to what the current price would be! Is that correct? If so, there is not a reason to buy tickets early!
EDIT(10/8/15-1030pm)
I just chatted with Disney Reservations and they confirmed that you can purchase your tickets early 2016)or earlier) for 2017 trip. The 14 day expiration only begins after the first park entry on your first day! So there will be savings there!