http://eu.battle.net/d3/en/forum/topic/10495112124#16
Full quote from the EU community manager:
Very much this! I’m not trying to be patronising when saying this, so please forgive me if I come across like that, but such is the nature of Diablo games—by playing the game you have a chance at acquiring the loot you are looking for, but it will never be possible to guarantee that you will get it. Because of this, it is also not possible for me or anyone else to say how much time it will take for you to get the item you are looking for, and whether or not said time is within reasonable.
Myself, I finally had some good luck; Tal Rasha chest, almost all of the Firebird’s set (which I don’t really care about since they aren’t better than my crafted items – plus they are going to be the most common wizard specific set items that will drop) where 4 of them dropped within the same gaming session, and a Thunderfury (which honestly, is a bit overrated and probably not as rare as people make it out to be – it’s a good weapon and much better than the Slorak’s I was using, but an item like a Wand of Woh or Shard of Hate are loads better IMHO).
All of this was based on pure good luck as I was doing absolutely nothing different. And most of the Firebird’s came from popping a chest. But this is the biggest issue with the current game where it’s all left to luck; where all this stuff can drop early on, or not for a long time. And that is exactly what happened with some players where they hit that lucky streak early on.
Again, in an open system like Diablo II, this kind of randomness will work well as one can potentially trade for items that aren’t dropping for them. I’m not going to debate the pros/cons associated with trading though since it’s all been said ad nauseum before. Put it this way, for myself, I don’t want something like the AH’s returning given it’s impact on the sort of itemization system (and the affect it had on the quality of drops) as well as how it turned into a meta-game of its own.