I think there are a lot of folks like Glaani describes. But, clearly, there are those that are driven to beat the content since every raid boss has been beaten (except for maybe some POSky mobs - Eye of Veeshan maybe?). Guilds such as Inglorious Basterds are clearly focused on endgame.
But a LOT of us are just chunking through the old content and enjoying ourselves
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And, unlike Glaani, I speak for all players on the server =P