Doh. When people play game, they are there to have fun. If people are having alot of negative experience in something thats suppose to be 'fun' then people will voice it. People use the arguement that the vocal people are just the minority. Looking at the big drop in population, the opposite is true.
Raiding is the apex of questing. You go through this whole process to fight an 'epic' encounter. Then all you got was a L10 vendor fodder. Its all hype without reward. Its like watching the movie that has great commercials. Only to get a dud moment when you actually watch it.
And to add insult to injury the vast majority of the raid loot is garbage. So in reality, not only does a player have to roll against a chance to get raid loot at all, then there's another roll of chance to get a non-garbage item.
So if you really want to do the math, not only is there a 1 in 6 roll for normal, then you have to roll 1 in 10 (or whatever number) of raid item that is actually usable. The odds become alot smaller then just 1 in 6 (or 1 in 4 on elite).