No, the devices with secure enclave (like 6/6S) are just as exploitable by the phonemaker.
https://www.techdirt.com/articles/20160218/10371233643/yes-b...
https://www.techdirt.com/articles/20160218/10371233643/yes-b...
Sounds like Apple needs to update Secure Enclave so that updating wipes the keys.