Frost mage sims very well but hasn't shown up nearly as strong in raid log parses. My ret spec on my pally is about 475 iLvl and does similar dps so it sounds about right to me. I mean, in fights with dps buffs, I can get up to 70-80, but I really don't count those so it kind of depends on the fights you are talking about. Hopefully someone with more frost specific knowledge can chime in.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng