This echoes what other developers have said in interviews and it interests me because one of the things we've bemoaned is the huge drought in content between the end of Siege of Orgrimmar and now - if they'd intended to have Warlords out in June, that would have been a fairly reasonable amount of time for a new expansion, really. (September to June is 10 months, long, but much more reasonable) and the idea that just throwing people at development doesn't immediately bring more content because they have to learn what they're doing makes sense.We did a good job earlier in Mists of Pandaria, having the content come at a more frequent intervals, and certainly we had hoped to have Warlords of Draenor out a couple of months ago. The reality is that scaling up the number of people that we have, to work on multiple projects at once has slowed us down. Honestly, it should have not come as a surprise to us. We increased the size of the team by 50% and the majority of those people had never worked on World of Warcraft before or any other MMO, so it is really difficult for them to create content right away, without getting up to speed.
I still feel like it's been a heck of a dry spell, all things considered. I really would like to see the alternate timeline where Warlords released in June.