Quote Originally Posted by Vecter View Post
This is one of 3 options for authentication, I don't see why guild access that requires the use of authenticators would be impacted by this. Its just a different form of the authenticator.
Unfortunately not

http://us.battle.net/wow/en/blog/1113829#blog

Person: Lylirra (Blizz staff)
Comment: "In order to be eligible for the Core Hound Pup and the authenticator-protected guild rank, you will need to attach either a Battle.net Authenticator or a Mobile Authenticator to your Battle.net account."