http://forums.worldofwarcraft.com/thread.html?topicId=4311223278&sid=1
its sort of a guide/warrior leveling analysis. the OP took exhaustive pains to measure the leveling power of the three "main" warrior leveling specs (2h arms, 2h fury, DW fury) and thoroughly documents the methods and results of each warrior while also maintaining a homogenous stat sampling across each of the three warriors (talents and enchants notwithstanding).
its a very interesting, but a very long read. ultimately, with the proper enchants, it seems that DW fury is the way to go overall, with 2h fury and 2h arms roughly tied for second.