I just upgraded to an iPhone 6s and now I have the opposite problem: the hardware is too fast, so fast that it replaced an ages-old pattern ingrained in my usage. I used to be able to tap the home button to turn on the screen, so I didn't have to go to the top of the phone for the power button. I could click the home button and move my finger before TouchID had a chance to notice. Now TouchID is so fast, it's unlocked the phone before the screen even turns on.

It sounds like a minor complaint and I guess it is, but when I'm fumbling around in the dark and I want my flashlight, or when I'm trying to quickly take a picture, I don't want my phone to be unlocked. I just want my damn flashlight or camera, which are easier to access if the phone is locked.

I'm actually considering going back to the 6 instead of the 6s just because I like that little delay in recognizing my fingerprint.