Of course GW2 has great support for parties, but they just don’t feel as necessary as they do in other MMOs, because your interests are always aligned with all other nearby players anyway. When someone kills a monster, not just that player’s party but everyone who was seriously involved in the fight gets 100% of the XP and loot for the kill. When an event is happening in the world – when the bandits are terrorizing a village – everyone in the area has the same motivation, and when the event ends, everyone gets rewarded.
Above is an excerpt from the recently launched Guild Wars 2 blog. Just wanted to take a moment and note that this new social system reminds me of the Public Quests found in Warhammer Online…except that everyone wins.