Well, you're also level 30 and the exp has been seriously altered for 51+ (where is starts to feel slow, at least how it used to be).
But yeah I have had a number of friends return to FFXI from WoW now, and there are many who play both of them. WoW you can get stuff done in 20-30min, FFXI you normally need around 2 hours at least to do a whole lot once you pass the low level areas.