Just wanted to make a few quick points here regarding some things I read above. First I think we need to be careful when we start naming "so and so" player is really hard to take down and so on and so forth. I think that may not really be offering a good baseline of what healers are capable of, especially when said healer is a warden. We all know certain names of people of various classes that tend to perform better than others, but they are obviously in the top percentage of their class else we wouldn't even be mentioning them. To balance all healers, or all of a class around these individuals would be doing the entire subclass a disservice.
Wardens especially have a lot of tools to keep themself alive with the stoneskins, great heals, and infinite power. They should not be used as a baseline. Consider Fury's whom are far less equipped to fend off large damage. In BG's I have seen certain Fury's typically top the heal parse repeatedly, but when encountering them they are not able to stay alive very well so obviously the parse is misleading. I just hope that isn't the number the dev's go to look at to decide on how to balance healers.
Another thing is that the healers that typically are the hardest to kill are the ones that have been around for expansions and have near full sets of pvp gear. In my half geared ranger I find even these healers do have a hard time keeping up with the damage. In my opinion I do not think even a predator should be able to outright burn a healer when they are expecting to be attacked, that is when gear is relatively similar, I am sure that is not how everyone feels though. Just my 2 cents.