I've found some things that seem to be wrong with this guide. For one, the spec isn't very good. Veiled Shadows is not very good. Unless you have really bad mana issues, then you really should not spec into it. Another is Blessed Resilience. I'd rather put that 1 point into Desperate Prayer, so when I get hit hard by something, I just desperate prayer. I can see why people would spec into Bless Resilience, but in my opinion, I don't want it. Also Body and Soul has yet to be some-what useful in Dragon Soul. I have yet to find a need for the speed boost for the raid. Only thing that comes to mind if people are falling behind on Heroic Hagara on the Ice Phase. But I usually just Life Grip someone if they are far behind. We have killed Hagara many times without issues. And only putting 2 points into Test of Faith is wrong. Also, 3/3 Darkness is very helpful.
Here is my spec.
Talent Calculator - Game Guide - World of Warcraft
Another thing I would like to point out is the Stat Weights. The "Reach 12.5% Haste and then stop" is correct for 25 man. 25 man has great use to Mastery for raid healing. But for 10-man. Mastery is weaker. I personally just go all out with Haste in 10man. I find it much more efficient.