I think you're wrong, people for whom WoW was their first MMO have become horribly spoiled by it - you should check out the AoC forums or the AoC thread on here, it's full of pointless little whines like "OHNOEZ THE COLOURS IN THE CHAT WINDOW ARE NOT LIKE WOW!!" or "I HAVE TO PUSH A BUTTON TO CHANGE WEAPONS ON MY CHARACTER IT'S NOT LIKE WOW!!" or "THIS SUCKS! I CAN'T SEE THE WORLD WHEN I TRAVEL FROM HUB TO HUB LIKE IN WOW!!", they get hung up on the tiniest little things and are annoyed by them to a huge disproportionate degree.
For me that's not a sign of how good WoW is, because most of the complaints I've read were truly petty. Rather, it's a damning indictment of just how these games (WoW possibly more than most, but true of ALL of them) are built from the ground up to be a completely addictive experience, offering mindless repetitive gameplay with the carrot of reward suspended just beyond reach. If people are so addictive to a particular MMO that they can't adjust to even the tiniest things in another, then I think that's indicative of just how addicted to the other one they are, not of how much worse the new MMO is.