I just found a REALLY simple way to explain it for all you people still concerned/angry/complaining about the fast lvling speed.
Okay here we go, Say each game has a % to it. For example, Mario would have 100% platforming(no leveling, no pvp, etc.)
Now(just gonna use ffxi as a comparative since its the only other *big* mmo i have played) ffxi has lets say, 90% level grind(maybe more, maybe less) and 10% lvl cap activities(pvp, dynamis, whatchamacallit, etc)
WoW has more like 50% leveling(which doesnt even seem like THAT much since you will be questing and ACTUALLY having fun while doing so) and 50% lvl cap activities.(pvp, battlegrounds, raids, instances, heroes, etc.)
Now, which would you rather do? 90% lvl grind and 10% fun? or 50% of fun leveling and questing and 50% of the fun lvl cap activities?
wheeee i dunno that just kinda came into my head