Yah seen this, thats why I asked. It's pretty close for some things.
I went from a 5 to 5S, and can't say I see much difference in speed, but I can't think of anything I do on my iPhone that requires more speed. It's not like I run video conversion programs on it! I'm sure the extra speed on the 5S is being put to good use in features like TouchID and burst photo capture, but for most everyday apps, the speed of the 5 was plenty fast enough.