I figured out that you don't press down on the icon, you just hold your finger there for a few seconds and then the app starts jiggling. No way really to confuse with 3D Touch. What I haven't figured out is how to select text using the 3D Touch method. I press hard on the screen and get the trackpad where I can move the cursor around but how do you select text? I haven't gotten this to work on the iPad either. What's the magic sauce?