Personally guilds are good for socializing. and a bit of structure. But I haven't see enough content in this forum referring to guilds or advent of them.
I have read things about alliances between cities and other players ( not to be confused with a guild ).
I have been a guild leader many many times I just dont see this game having a Guild system. being an RTS it leans closer to Alliances and a Total war type system with trade agreements and alliances..
EQ1 Guild leader 4 years
DAoC Guild leader 2 years
Shadowbane Beta Guild leader 1.5years
EQ2 Guild leader 1.5 years
AoC Guild leader not very long couldnt stand the game after a 2 months..