I'm seeing the same thing with my iPhone. I Have a 4S and while I like what the 5s brings I'm just not sure it's worth upgrading now. There is just starting to be the very hint of slowness in some things on the 4S, but it isn't anything like when I went from the 3G to the 4s. That was a huge upgrade. Now it just doesn't feel necessary to buy the next thing on the same schedule.
