You are wrong there, so let's stop a second.From a fan point of view, and a gamers perspective, it was amazing. From a businesss point of view? It wasn't.
Seems Blizzard is here for the "game" and "gamer". Therefore, it should take risks and decision making the game experience primary, and not worrying about short-term issues of casuals not being able to clear content (constant nerfs will allow them to, anyway).
So let's cut out his false statement. If whizzing through content is justified by numbers, why would so many leave?
And why did Blizzard state "We will never do an Ulduar type raid again!". I feel this was the only thing they did right in WOTLK, having created Ulduar.