Do not try to engage into passive-aggressive combat with me, boyo, this is the game you will never win. And it's anyway doesn't make much sense to make healer Cowgirl, because healing power scales with Intellect, except for HoTs, and thus this is more effective to use Cleric as the main healer. Especially because Cowgirls has a huge boobs, which lower their Clearheaded chance at full lust. And they initiative is also very low.
Watch out, we've got a badass over here.
The truth is, none of us will win, because mods will step in long before I'll even warm up and delete all the comments we wrote recently in this thread for a good measure due to offtopic and pointless squabbling (started by you, I may add).
As for the topic at hand: No.
1. Healing scales with WISDOM, not Intellect. Intellect, which is the Cow class stat malus, affects magic damage, making them that bit worse at dealing damage(-10% additive), not healing.
2. Cleric class gets +3 Wisdom, which is equal to +15% healing power (additive) and is completely inconsequential when we're talking about +250% or more in total healing power.
3. Cleric heals have worse base stats and the class doesn't have a dedicated self-heal, while a Cow does and which makes her effectively immortal.
4. Cow class can equip a weapon which gives any character on the party access to powerful heal on their turn as well and doesn't depend on mental state of the Cow in question.
5. And... initiative? Really?
First of all, neither Cleric nor Cow get ANY class bonus to Initiative.
Secondly, at the start of the combat everybody's full HP, so a high initiative healer has nothing to do and a healer with low initiative goes after everybody else, so she can heal everybody else even in the first round. Best a Cleric can do is throw a Bless on a single person here, if she goes first.
So... you only get half a point for the boob size argument, because of the point number 4.