My wife and I both upgraded to the iPhone 5s and we're noticing that Touch ID appears to works faster on her 5s than mine. We added each others' fingerprints multiple times to both phones and we can both unlock faster with her phone. Not sure if it makes a difference but she has an AT&T 64GB silver 5s, mine is a AT&T 64GB space gray 5s. I did not set up a passcode on my previous phone so having to spend more time on the lock screen before is a bit of a drag. I know it's in the name of security and that I may be splitting hairs over a fraction of a second each time but it's hardly trivial considering how many times we take out our phones each day compounded over the life of the device. I think the speed at which her phone unlocks is perfectly acceptable, while mine being a fraction of a second slower is borderline (un)acceptable. Has anyone else run into issues/variances with Touch ID speed, or possibly have any tips/workarounds?