WoW is an unusual comparison, because Blizzard is in a weird place where they can give nothing, and get everything. Fans of that game will praise it like some sort of god, no matter what Blizzard does, but this is the result of being king of the hill for many years (which was earned at first). Other companies like NCSoft/Arenanet, BioWare, Trion Worlds, etc., don't have this luxury. And to be fair to WoW, it is still the only MMO with competitive PvP
It's not fair, or even logical, but even if Guild Wars 2 keeps up in terms of content release quality, and quantity, it'll still be judged more harshly, while WoW players keep playing WoW, regardless of what Blizzard does to that game. I don't think Guild Wars 2 released with enough content to really satisfy people, nor compete in the market. It's not a hopeless battle though, being buy-to-play, rather than requiring a subscription gives GW2 a lot of space, and gives NCSoft/Anet a lot of time to work with it, and make it better
All I'm saying is that "it worked for Guild Wars (1)", or "it has a different target audience", it's an "MMO revolution!", etc., aren't things that give GW2 a magic barrier. It has a good chance (again, "good chance" as I've used in both instances is only a probability, not a certainty") of reaching a crash and burn point, with the current state of the game
---------- Post added 2012-09-17 at 11:13 PM ----------
My wording wasn't the best, I should have said "limit" (A lack of content will limit this model), rather than "hurt". I'm sure Guild Wars 2 has already proven financially viable, but I think they're not looking at very much chance for upward mobility right now. While this won't damage Guild Wars 2, or NCSoft/Anet in the form of direct impact, it will likely result in a slower pace of development, as well as less funding, than if the game reached a higher point of success, with more, and/or better content