Didn't that seem a little fast? The original WoW content took a few years to "beat," it seems, and now Burning Crusade (and the 2.1 patch) has been beaten by players in a matter of months. Is the endgame going too fast? From Boubouille's wrapup of the Illidan defeat yesterday, we get this post on the Elitist Jerks forums by Tigole. He says Blizzard is very happy with the way Black Temple is tuned. He also takes a look back at Naxx, and says the Four Horsemen were an example of an encounter that was well-tuned, but players at the time didn't have the gear they needed, so it took much longer for guilds to finish them off. The biggest hole in WoW content right now, Tigole says, is the lack of options after Karazhan for 10 man raids-- but, he says, "we're fixing that." So /cheer for more 10 mans to come.
But is the endgame dropping too fast? In my estimation, not at all. In my estimation, Nihilum is not a normal guild. If you're willing to give them the benefit of the doubt on gold buying (and frankly, I am not-- I believe they're cheating), they clearly play the game more than anyone else, driven by both their own determination and the fact that they are basically raiding celebrities in Azeroth. They are the hardcore. And if you're asking me whether hardcore players should finish the endgame content quickly, I'd say they should.
Why? Because that means it will be that much easier for casuals to get there, too.