I have had the same on my priest, and I have read a number of reports from other priests on the wow forums who have had the same experience.
I have also faced disappointment from PUG members when they find out I am not shadow specced.
Blizzard needs to do something imo, and I think it should come in the form of a holy priest buff. Either tweak a holy spell, modify how some of the talents work in the holy tree... something. When I play my non-healing toons, I see first hand how good of a 5-man healer the paladins and resto shamans are.
To be honest I see them as healing just as well, while being able to provide something more, such as additional buffs/totems, and the ability to provide more dps than my wanding can do. I also think that for priests with the imp wand talents, using a wand should not invoke the global cooldown. That way priests could wand more frequently without worrying about the global cooldown costing them precious time when it comes time to manage some unexpected spike in dmg.