I know its not all of you because i have had some really good tanks the last couple of days, but i would say 4 out of 5 expect the flow or 5 man normals to go as fast as wolk. 81-84 is a very stressful time to be a healer. Our spells don't heal for shit, they cost a ton and they are slow has hell to cast. It will get better with gear, but till then please before you move to the next mob do your healer a favor and see what he/shes doing and what his/her mana is at.
Love,
Resto Shaman.