"...Apple's Touch ID faced its own problems early on, including "fade," or the increasingly erratic performance of the fingerprint sensor over time. iOS 7.1, released in March, solved the issue..."
What evidence, beyond anecdotal, is there that 7.1 solved the fade issue? Apple's release notes only stated:" Improves Touch ID fingerprint recognition." Meanwhile there seems to be plenty of anecdotal evidence fade is NOT solved.
The "fade issue" is still there for me (sharp drop off in recognition starting on the second day after putting in "new fingers", twice per finger) and apparently also for at least one other commenter above. I might as well have bought a 5C (if I could ignore the aesthetics).
Yes, after giving 7.1 a few weeks I'm off to the Genius Bar soon to complain.