In Classic WoW, taunt and challenging shout were affected by spell hit chance, and the chance to miss was the same as other spells (physical school). In patch 2.3, taunt and challenging shout were changed to instead be affected by (melee) hit rating.
In Classic WoW, taunt and challenging shout were affected by spell hit chance, and the chance to miss was the same as other spells (physical school). In patch 2.3, taunt and challenging shout were changed to instead be affected by (melee) hit rating.
source1: 2.3 patch notes for challenging shout and taunt source2: EJ TBC Protection Warrior Guide, section VII e