Wow, Blizzard always says they don't balance for 2s and it shows. Shadow Priests are currently dominating that bracket at 21.1% rep above 2200+, while only 4.6% global rep. I think Disc definitely shows itself as the strongest healers in 2s at 16.9% 2200+ and 3.2% global.
http://www.worldofwargraphs.com/stat...0-0-2-0-0.html
Also, your two biggest offenders are way down on the list. Frost Mages 1.4% 2200+, and Subtlety Rogues 0.0% 2200+. Wonder why Assassination is so much better in twos than subtlety (Assassination Rogue 4.2% 2200+)