While I am satisfied with this official ruling gifted to us from on high, The rules I quoted earlier (esp 714.3e) still seem, in my mind, to contradict 718.1. Avenging wrath shouldn't say "this turn" if it is not going to do what it says for the entire turn, and instead sort of doubles your attack this turn.
"Double any attack you had before you played Avenging Wrath this turn. If that attack is again added to your hero, it's doubled, but if a new attack value is added, it is not doubled."
Screw Pallies
: P
Rules Knowledge - World of Warcraft: Level 1