Another interesting commonly held belief about healing vs damage I picked up from the Blizzard forums:
Talents affect damage AFTER +spellpower (+damage) is applied.
Talents affect healing BEFORE +spellpower (+healing) is applied.
in other words, if your multiplier from talents is X:
HealingFinal = Healing * Talents + Spellpower
DamageFinal = (Damage + Spellpower) * Talents
In other words, if you have a LOT of +spellpower, your healing talents are kind of worthless. But this is not true for damage! Damage talents and +spellpower work togther, so that damage talents multiply your +spellpower.
I report, you decide.
[edited said power when I meant talents]
Talents affect damage AFTER +spellpower (+damage) is applied.
Talents affect healing BEFORE +spellpower (+healing) is applied.
in other words, if your multiplier from talents is X:
HealingFinal = Healing * Talents + Spellpower
DamageFinal = (Damage + Spellpower) * Talents
In other words, if you have a LOT of +spellpower, your healing talents are kind of worthless. But this is not true for damage! Damage talents and +spellpower work togther, so that damage talents multiply your +spellpower.
I report, you decide.
[edited said power when I meant talents]