I've only been 80 a few weeks and I'm already regularly raiding ICC. LolWOW. It's great for passing time but it is by no means a remotely challenging game.
FFXI players are some of the best WoW players because we know how to apply common sense and understand the value of strategy and teamwork.
I will say though, WoW definitely has something FFXI will never hold a candle to.. PVP factor. FFXI wasn't designed for PVP and SE's attempt at it was a disaster.