How good does Paladin heal in PvP?

Paladins have 2 basic healing abilites - a very efficient, fast casting, but rather weak Flash of Light, and a 2.5 second, bigger and much less efficient Holy Light. The 3rd, Holy Shock, is an instant that heals for 380 and costs about the same, has a 45 second CD and, being an instant, scales a bit poorly with +healing.
I played Priest of Feenix and healed in PvP, having no trouble healing multiple allies that were being under attack at the same time with the mix of PW: Shield, Flash Heal and Greater Heal when needed. I know paladins have a different approach to healing, but I'm still curious about how good they can heal multiple allies. Holy Light has weaker base heal than Greater Heal, scales less since it's base cast time is 0.5 seconds shorter than GH, and after talent modifications, it even costs more than Greater Heal. Flash of Light, on the other hand, seems more like an uber-efficient raid heal than a reliable PvP heal to me.
What I want to know is how Paladins fare in group PvP healing. I know they are much more endurable than Priests, they can remove poison so Hunters cannot drain their mana, they have plate and shield + bubble, so it's only logical to assume that a focused paladin will last much longer than a focused priest. However, the base healing on Flash of Light is so weak, so even with naxx gear, I don't see it healing over 1k.
Is there any paladin with experience in PvP healing out there? I am starting a paladin healer on Nost PvE because I want to try out something new, and I would just like to know what I should expect of this playstyle, PvP-wise.
Apologies for a bit longer text than intended
, hope to hear from you people soon. 
I played Priest of Feenix and healed in PvP, having no trouble healing multiple allies that were being under attack at the same time with the mix of PW: Shield, Flash Heal and Greater Heal when needed. I know paladins have a different approach to healing, but I'm still curious about how good they can heal multiple allies. Holy Light has weaker base heal than Greater Heal, scales less since it's base cast time is 0.5 seconds shorter than GH, and after talent modifications, it even costs more than Greater Heal. Flash of Light, on the other hand, seems more like an uber-efficient raid heal than a reliable PvP heal to me.
What I want to know is how Paladins fare in group PvP healing. I know they are much more endurable than Priests, they can remove poison so Hunters cannot drain their mana, they have plate and shield + bubble, so it's only logical to assume that a focused paladin will last much longer than a focused priest. However, the base healing on Flash of Light is so weak, so even with naxx gear, I don't see it healing over 1k.
Is there any paladin with experience in PvP healing out there? I am starting a paladin healer on Nost PvE because I want to try out something new, and I would just like to know what I should expect of this playstyle, PvP-wise.
Apologies for a bit longer text than intended

