Apple two days ago released its iOS 7.1 software update containing a host of bug fixes, performance improvements and a couple new features.
Among the enhancements: better Touch ID accuracy and reliability. For the vast majority of iPhone 5s owners, Touch ID indeed seems to be working better and faster after upgrading to iOS 7.1.
On the other hand, a growing thread on Apple's support forums clearly indicates that a subset of iPhone 5s owners could be plagued with various issues with the sensor.
The hiccups vary from Touch ID not working at all or functioning only sporadically to having difficulty producing a match, saved prints in iOS Settings > Touch ID & Password mysteriously disappearing and more.
And how's Touch ID for you in iOS 7.1?