I'm really leaning towards switching down in size from the 6 Plus to the 6S. My current biggest gripe with the 6 Plus is not the size but how underpowered it is. Due to Apple giving it the same specs as the 6, it lags and/or stutters quite a bit more than the 6 did when I had it. This isn't just isolated to me either as friends who I convinced to switch from the 6 to the 6 Plus also experience worse performance on this model. It's clear that the larger screen needs a little more power than the smaller one. I want the fastest and smoothest performance available on my iPhone and the 6 Plus isn't it. Landscape mode is barely used by developers other than Apple themselves so it's not a big selling point either. The only real advantage to having the bigger phone seems to be the amazing battery life. Though the 6 does indeed feel much better in hand, the size of the 6 Plus never bothered me to carry around and I can do most things one-handed with it as well.
So if Apple releases the 6S and 6S Plus with identical specs like they did the previous models, then I'll likely move down to the 4.7" despite how much I've been spoiled by the near all day battery life of the 6 Plus.
So if Apple releases the 6S and 6S Plus with identical specs like they did the previous models, then I'll likely move down to the 4.7" despite how much I've been spoiled by the near all day battery life of the 6 Plus.