What the fuck?! But didn't Gabe say that they would be showing off something related to the number 3 at this year's E3, thus hinting at them showing a game with 3 somewhere in the title?
Dammit, man, Valve is one of the most frustrating studios to be a fan of. Yes the payoff is always fucking awesome, but we have to go through their little game of, "Oh we're doing such and such at this date." *date rolls around* "Oh, sorry, we meant at THIS date right here!" Rinse and repeat until they finally get around to doing what they said they were going to be doing.
But, like I said, the payoff is oh so worth it.