There is always question on whether the output of healing meters (healing charts) can be used in indicating a healer's performance. Unlike points of damage, where heals go matters. While everyone has use for a heal, some players will need it more than others.
Healing meters (such as the 'Healing done' component of Recount) collect raw figures from the combat log. It becomes easy to assert, from skimming over the healing chart, that all hitpoints (HP) are created equal, with all players appreciating 1 HP of healing equally. However, I would not.
1. Factoring in absorptions
When a player inevitably takes damage, a healer can respond to it in any of two ways: