I guess that means the terrorist used a 4 or 6 digit numeric only passcode....luckily for the FBI!
True. iOS now supports alphanumeric passwords up to 20 characters in length. The memory copying approach they likely took (NAND mirroring) would not have been practical with a strong password. It's been reported that the phone had a 4 digit passcode.
The iPhone encryption was not broken. The passcode was brute forced. What was broken is the 10 failed attempt counter.
I'm wondering if Apple will introduce more hardware anti-tampering features in the future.