The question is...
how many people have quit WoW recently?
Recently, I have started playing more. While I spend a decent amount of time leveling the two characters I hope to get to 60 someday, I spend more time playing lower level characters with 2 of my real life friends and my girlfriend who can't keep up.
Even if I do get those characters to 60, although I'd like to try raiding, I'll never have the time to commit to it.