How many people here are new to watching the progression race? This is nothing new. The majority of the raid falls over pretty quickly, and the last few bosses are what takes significantly more time.
http://www.wowprogress.com/guild/eu/.../rating.tier17
http://www.wowprogress.com/guild/eu/...ting.tier16_25
I am not saying that this raid will for sure be as difficult as previous raid tiers; there is no way to know that until the top guilds get to Elisande and Gul'dan. This could end up being another EN, or the end bosses could be tougher than Helya, but at the moment, nothing out of the ordinary has happend.