You all seem to be missing Greg's point. Greg was claiming that "We've got a lot of players into raiding now."
Maybe what I should have countered with was "prove it".
Link the RAID achievements vs. the number of level 80s and show us that level 80s who play on average 10 hours a week have lots of raid achievements.
"You can "know the fights" by looking them up on wowpedia.org or youtube. Or tankspot. Or bosskillers. Or a half dozen other sites."
"I want to raid but I'm not sure how," or "It's too hard." "
Your statement is directly at odds with Greg's.
Here's how hard it is for me to use video.
1.) As tank I've had to use ALL of the sites you've listed to "know how." No one site works.
2.) Many of the videos are out of date.
3.) Videos are for a class you are not playing. Good luck trying to tank a fight as a warrior when the video is paladin.
4.) Videos have characters far better geared.
5.) Most of the videos have the UI so tweaked and custom rigged it makes them difficult to understand and they require watching repeated times.
So I disagree with him saying that users don't feel the "know how is hard". It is hard, especially for tanks.
And I'm still surprised at how many players do not have Deadly Boss Mod set.
If a player has to spend 30 minutes to an hour scouring the web to "know how", maybe it has been two months since that raid, then this directly contradicts Greg's statement that "I want to raid but I'm not sure how," or "It's too hard."
Why do you think the tank ratio is so low? Because it's too hard.