Can we all just assume people are stating opinions, and let the OP decide which opinion sounds logically astute (which are usually the opinions that have a lot of information to back it up), instead of derailing the thread with Moderators arguing with each other saying "You're stating things like facts", "No I'm not", "You are" etc.
I'm a tank not a healer for a 10man guild, so obviously I love me some Disc. I feel like (in 10 mans) Discipline priests have the potential to be the best tank healers by far. I feel a lot safer being healed by a Discipline priest than a Paladin (with Druids and Shammies far behind). Holy Priests on the other hand, whilst great raid healers don't really have a niche, and for 10-man raiding it's a lot harder fitting in different niches with so few healers, and the fact that Holy doesn't do much better than an RDruid just makes me feel that they're not as desirable as a Disc Priests are.