I've used APC kiosks at well more than a dozen airports, most of them this year too; and not once did we as US citizens have to submit fingerprints to use them. I'm including a few entries within the past four weeks too.
Some APC kiosks, having fingerprint scanning capabilities, are used by a set of qualified users of the US VWP. Even there, fingerprinting is not required of US citizens.
Last edited by GUWonder; Dec 7, 2014 at 3:38 pm