Guild leveling in Catclysm

[Brandish]

Any intel on how the new guild leveling works?

Are smaller guilds going out of style in favor being able to get the rewards from a large, more leveled guild?

[Maxion]

Smaller guilds can get to max level just like any other guild, it'll just take more time than in guilds with more people.

[Zub]

Smaller guilds can get to max level just like any other guild, it'll just take more time than in guilds with more people.
isn't it a minimum of 10 however? like they take only the 10 most active people or something.

will it still work with 5 active in the guild (my toons) and take double the time or will it just not be available under 10?

[offive]

There is a weekly guild XP cap. You get GXP from questing, dungeons, PvP... etc. You also have to get rep with your guild to get access to the guild items once they are unlocked. I am not sure what the weekly cap is, as on beta the GXP is boosted to allow people to test. I think there are some posts out there on it though, but it all could change in the next 2 months.

Guild perks unlock at each guild level, things like +5% XP, more rep, 15m cooldown on hearth. A lot of the perks are tied to achievements, some of which are simply insane.