And that is where I stopped reading your post because Wrath had the largest amount of subscribers. It's a statistical
fact. This
link takes you to the timeline. Look at November 2008 - "World of Warcraft hits 11 million subscribers worldwide." And it doesn't really matter when they "first" got the subs - the truth is - if people didn't like the content - they would have quit (as Cata has been showing).
OT: Hurray for new stuff!! The pet battles were fun before they got broken somehow this morning. =/