I would not assume that every iPhone user who upgraded to the iPhone 6 or 6 plus upgraded from an iPhone 5S after only one year. My guess is that many of them upgraded from the iPhone 4, 4S, and 5 after two or three years. The iPhone 6 is not too big for some people's hands. It is too big for others. That's one reason why the iPhone 5S and 5C are still selling.
4/28/15 at 10:25am