83% of iPhone 5 owners use fingerprint scanning

"Touch ID, which only comes on Apple's latest flagship smartphone, but is rumored to come on the next version of the iPad, currently only works to unlock the phone and make purchases from Apple's App, iTunes and iBooks stores.
Touch ID isn't perfect. I like it, even though it doesn't always work for me. And there are certainly those who've given up on it completely. But before Touch ID, fewer than half of iPhone owners used a passcode on their phones, Apple said. Now, 83 percent do.
"Touch ID has been extremely popular," Craig Federighi, Apple's senior vice president of software engineering, told a crowd of developers and reporters at Monday's annual developer's conference."
Source:  Huffington Post, 4th June 2014