So many clues pointing to new screen tech (OLED or mLED) for the iPhone 6s/6s Plus:
1) The apparent inability of LCD screens to integrate with Force Touch, based on the current availability of such screens, namely the Apple Watch and a new smartphone from ZTE, the Axon Mini which features an OLED screen with Force Touch. The likely possibility of a rippling effect on current LCDs.
2) Reduced battery capacities for both the 6s and 6s Plus possibly indicating a much more efficient screen technology such as OLED or mLED that may even increase battery life in conjunction with the more efficient A9.
3) iPhone 6s/6s Plus code indicating a software-based flash for the FaceTime camera, which would probably require a brighter display such as the one you get with mLED in order to be useful as a hardware flash replacement.
4) iPhone 6s and 6s Plus getting the same animated wallpaper like you have on the Apple Watch, which according to Jony will only look "more magical" on a better display, like OLED on the Apple Watch.
5) Apple placing a bigger order for the iPhone 6s/6s Plus, possibly indicating Apple's confidence in getting a good number of iPhone 6/6 Plus owners to upgrade in addition to remaining Android holdouts and those waiting for a new 4" iPhone. All of this confidence based on the "visual impact" that people will be able to show off to their friends and family. That in addition to the improved performance, significant camera upgrades, multitasking, etc. Maybe interacting with those animated fish on a much better looking display possibly using Force Touch will be enough to convince a lot of people to upgrade, gimmick or no gimmick.
6) iPhone 6s/6s Plus uses only a single display connector, not two like with the current LCD. Which display tech uses only one display connector - OLED (or the improved mLED which may be what Apple decides to use).
7) Jony doesn't like the LCD in the current iPhone and probably wants to hold an iPhone with a better display sooner rather than later. Maybe one more year didn't cut it with him and he convinced Tim to add mLED to the iPhone 6s/6s Plus so they can say at the iPhone intro next week that their new displays are better than Samsung's AMOLED. Bragging rights go a long way in the fierce competition between Apple and Samsung and the media usually pays closer attention to Apple when they actually do leapfrog Samsung in tech...or even when they don't.
With all of that said, I voted 'Maybe' because I've been letdown by Apple before when it comes to rumored improvements/new features & tech.