It's similar to the Diablo 3 release dates before this, and the many other release dates before that one. It's a place-holder, nothing else.
That being said, I wouldn't be too surprised at all to see a June 26th release date. The end of June/July month seems perfectly reasonable to me, given the state that the game is in. That and ArenaNet has said that the time frame from the Beta to release won't be nearly as long as with other MMO's.
"That was quite a move. I'll admit you've got potential. If challenge had a taste, you'd be quite delicious." - Travis Touchdown (No More Heroes)
Correct me if I'm wrong here but gamespot normally doesn't put exact release dates unless its final. I usually see them put quarters (Q1, Q2, etc..) for unsure release dates so this is a bit puzzling. With that being said, I wouldn't put my hopes up until I see an actual release date coming from the developer.