If you already read forums or read trade chat (why would you do that, though?), you don't need to read anything else about the state of World of Warcraft's active subscription numbers, I'm sure - but I don't usually talk about the active subscription counts, so hear me out for a moment.
This is the (cropped - view full, interactive chart
here) chart of WoW's active subscriptions. At Warlords release, subscriptions skyrocketed to be as high as they were at Mist's release, clearing the leap upwards from the dismal sub count that Mists had earned after overstaying its welcome with over a year of SoO. With this latest report, we're seeing that in record time of only six months, subs dropped back down dramatically to almost as low as they were at Mists' lowest point,
However, in case you forgot, Mists' release came with that
Annual Pass deal - free beta access, a mount, and Diablo III for free - if you had already paid for Diablo III, you had game time credited for the worth of the game - if you agreed to subscribe to the game for a full year. Cancelling before your year was up revoked your mount and Diablo III access. Of course, after the Annual Pass ran its full year course, the subscription count was 7.6M.