Terrible Reporting About iPhone Security ⇥ imore.com
Rene Ritchie of iMore hits the nail on the head:
Since most people aren’t high level threats, and since the iPhone is a consumer electronics device, Apple start off towards the convenience end of the spectrum.
In general, you are not very important. You are unlikely to be targeted in a CSI-esque plot to steal your fingerprint and unlock your phone so some nefarious guy can sext your best friend. Don’t panic.