I agree that it's likely the PvP rank. I could definitely see that taking a year or longer. Although plain old level 60 is still plausible - while it only took 11-15 days to level 60 if you knew what you were doing, a lot of us took longer than that because we took a roundabout route, whether out of fun or ignorance -- or leveled multiple characters before picking one, or maximized our tradeskills while leveling as seemed logical initially, etc.