I'm not sure if it's just me, or if other healers on the server feel the same way, but I have to put it out there to find out. . . I want everyone to realize this is not to be putting minnies against rks, both have their strong points AND both can heal quite well. That said, minnies and rks do not heal the same way-minnies are able to heal large amounts at one time, rks heal smaller amounts over time that add up (just for those that didn't know, believe me, they're out there). Neither class is capable of the impossible which is what some people seem to expect from them.
I have recently been in a raid where the leader (a minnie in the other group) told me I had to heal my group more. Sadly, I was sitting at less than 1/4 power because I had been healing my group (and the other group when needed). . . at least the ones I could reach. In my opinion, it is not a healers job to run around and heal people who are out of range, it cuts out time that can be used for inductions; therefore, less heals overall. If people want heals, they can move closer to the healer. If there is a reason for the healer to move, then by all means, move. . . but if it's to reach one or two people out of range because they can't keep with the group, it's up to those people to find their healer.
Also, there is an old myth, "if the group completes the instance, it's because they had a good tank. If the group wipes, it's because they had a bad healer." I've heard this since I started playing and I still can't believe it. I don't think the tank or the healer can be held fully responsible for how well or how poorly a group does. If the people in the group can't work together, it doesn't matter how good or bad anyone in the group is-nobody will live long enough to find out.
If for some reason anyone thinks I'm wrong on these points, please let me know. All advice is good advice if it's used wisely and it's always nice to learn something new. Who knows, maybe I missed something somewhere along the way.