In a couple of specualtive threads about the new raid encounters and boss fights I have seen a lot of people say something along the lines of 'It should be really hard and take several weeks to do.'
Now, while I understand the sentiment behind this I do feel that people need to wake up a little bit and start to be realistic. It doesn't matter what the encounter is like, who the boss is, how many encounters are within a single raid, they will be completed within a week or two of them being released. The only way to slow this down is with artificial checks like resistance fights and magical gates.
Why is this? There is not a force on this earth that can create content that will stand up to the sheer weight of the top competative guilds hitting it hour after hour, day after day. It just can't be that way, and if it IS, that is bad game desing pure and simply. These guilds take time off work, sit in a bucket in case of a call from Mother Nature and have liquid vitamins intraveinously put into their bodies.
Bosses will always be downed rather quickly in the face of this onslaught. Even then though, quickly in terms of days is NOT quick in terms of game play hours. Taking 18/19/20 hours to get a boss down in a world first capacity is a HUGE amount of time. Thats more play time than most Playstation 2 games.
So when people talk of things getting too easy because Arthas has been killed a week after Icecrown, bear in mind what he has been up against during that week.