It seems like they don't have the exponential delays, but they do have delays. Why else would it take 3 days to unlock the phone if it has a 6-digit passcode?
Apple's security paper says it would take more than 50 years to brute-force an alphanumeric 6-digit passcode at 80ms per iteration. I suspect that's still correct here (if “3 days or more” is for 6 numeric digits).
Apple's security paper says it would take more than 50 years to brute-force an alphanumeric 6-digit passcode at 80ms per iteration. I suspect that's still correct here (if “3 days or more” is for 6 numeric digits).