One of my major concerns when switching from iPhone to Android is the sluggishness of the Android OS. After I got the Note II, it was proven to be as smooth as any iOS version. And then I got the iPad Mini over X'mas. I was playing around with it and realized how slow this thing is! I was completely spoiled by the speed of the Note II.
When you go from slow to fast, you don't immediately notice it. But when you got used to the faster speed, you will notice immediately when things are 0.1 sec slower. Apps are slower to open on the iPad Mini. Certain function is slower to respond. And what I missed the most when playing with my new iPad Mini are the return and menu buttons! How could I live without them for all those years on the iPhone???