If iPhones phoned home information on stored on phones, I'd expect there to be a huge shitstorm and ample evidence of suspicious traffic. Do we have any evidence _at all_ that this has happened?
We know that the info can be sucked out of Apple (or Google, or Faceboob, etc) if the NSA wants to (for now).
So if they have your fingerprint data ... or even the ability to suck stuff off your phone ... then ... well qed
look obviously I'm in the minority, in caring about my biometrics being "built in" at such a "ground level" to a device that has so much connectivity to "the cloud" ... if you're not disturbed by this, then fine. I'm ok, you're ok. It is ok to hold different views.
For me, it's very relevant whether we have any evidence that the government is collecting data residing _on_ iPhones on any scale, or whether the iPhone has any such capabilities built in. As far as I know, this hasn't been reported.
I know that Apple technically can push out a software update that would enable data collection or even covert audio recording, but in the end I have to make a decision on the likeliness of this vs. the convenience of having a smartphone handy.
Regarding fingerprint data, the US already has that and will continue to do so for 50 years, due to the fact that I had to travel to the US for work related reasons. Not happy about that, but, well, that's life.