GW2 is NOT an Asian MMO. ANET has their headquarters in Washington. The founders of ArenaNet were former employees of Blizzard Entertainment who played important roles in developing WoW... believe it or not. The game just got out of alpha and is already incredibly polished and fluid.
The mere fact that you think it's an Asian mmo is proof that you have no idea what you're talking about. Please educate yourself Here Here Here and
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Guild Wars was generally well-received by both the players and the media, earning (to date) a metacritic (media) score of 89, which is fairly high. They sold millions of copies world wide and they are finally trying their hand at a true mmo. (Guild Wars was not considered an MMO even by the developers).
Guild Wars 1 was a HUGE success and they have an EXTREMELY talented team with veteran WoW developers at their helm ready to revolutionize the MMORPG genre.
The fact that you even ask who ArenaNet is shows how little you know about the MMO genre.