I don't think other than full-on 20-hour-a-day 7-days-a-week players that even hardcore players will "finish" the game terribly quickly, plus there's plenty of stuff including Fusang to keep you occupied until the monthly issues start hitting with new content (including the one coming on the 31st, which (yay!) includes the auction house's return with better functionality since it was removed shortly post-launch). The first monthly issue alone includes a few new Nightmare mode dungeon versions and a buncha quests + other stuff.
As a "hardcore" or fairly harder-core player myself, I disagree. I've been playing around 8 hours a day for the last 6 days including today, and am not even very far into Blue Mountain yet. That's one of the earlier zones for people wondering. I'm guessing I'll be another few times this playtime before I could reach endgame (though I'll probably slow my play a little soon), and obviously at endgame there's a nice amount of PVP to be had in Fusang, plus there will be several Nightmare dungeons and other things to do still (more XP for spec points, trying new weapon setups or roles, farming for money,
Lore exploration, achievements, finishing out quests in the zones that I missed, etc.) even if I cap out on gear. Plus a raid is coming soon as well as a PVP dungeon (which should be fun stuff if it's any good!!). I think even us harder-core players have plenty to chew on with this game, and if you are a normal or casual player, you're going to have plenty to do for ages to come.
No the game is f'n short. Not a bad game but very disappointed how damn short it is.. I have about 3 days of "played" time /played and im almost to Transvalyania the last f'n zone. im wearing all QL8 with some QL9 and QL10. ive done all the dungeons so far that i can actually do just started doing pvp to give the game some length but i can tell ill be about done withe game in one week or two tops, so 1 Month of full play time and you beat this game.. which i guess is good since ill move on to guild wars 2 but it was worth the 1 month journey.