That and the pre-orders become available next month and Anet are not the type of devs to have the game come out 9 months after the pre-order. I suspect it'll be coming out this summer.
Pre-order and pre-purchases, actually, which makes it much more likely that release is at least within the year. And yeah, the general consensus among fans is that it's either going to be out in June or September(though personally I think it's more like June or late October-early November, since MoP seems to be headed for a septemberish release, and releasing at the same time would seriously screw with gw2's launch).
Regardless, unless a virus destroys half the code for the game or something, it's nearly guaranteed a 2012 launch, considering how much info they're putting out there. The hype they're building would be lucky to last till the end of the year, let alone past that.
Needeless to say, I'm really really looking forward to this game.