Mmmmmmmmmk moving along from the stat wars because arglebargleclownfartLOOKHOWSMARTIAM is already getting old, and if two stats are close enough to argue about, it cannot possibly be the main problem or even a major one...
You want simple answers to why your Shaman is doing badly? Here's what everyone has said.
1.) Not using Flame Shock = 10% DPS loss.
2.) No Searing Totem = 10% DPS loss.
3.) No Fire Elemental = 10% DPS loss.
4.) No Echo of the Elements = 5% DPS loss, maybe more.
There. Fix those and she'll be in range of everyone else's DPS. Things like better trinkets and the Level 90 talent can come later. Fix the big stuff first.