I don't believe this, unless you are tanking below 12, or pully only 1 pack at the time.
This is untrue and impossible.
Try tanking initial pull of 2 entrance mobs + 2 mobs deeper + hunter and 2 bears at the beginning of atonement which is one of classical pulls - without kiting - you will die no matter what defensives you will use, unless you slow and kite. Even without loyal beasts cast.