My guild did RS and ICC last night, and after seeing my healing numbers, my rejuvenation was around 40%, wild growth 20%, lifebloom 15%, regrowth, 10%, everything else 15%.
Problem is I don't see this changing come cataclysm:
Lifebloom is one person only limiting the usage.
Regrowth is going to be our expensive heal, so I see its already lower usage going even lower.
Wild Growth now has a 10 second recharge.
Swiftmend is same situational spell.
And Nourish has had its cast time about doubled.
So besides lb on the tank, and wg for aoe, I just do not see another viable option except to just rejuv more.