As we all know, Game Informer and Valve are bros.
What gaming publication had exclusive information and screenshots of Portal 2 way back in April on one of its issues, and had their own Portal 2 Hub through which they continued to release Portal 2 info on their website? Game Informer, of course.
What gaming publication came forward with the exclusive announcement of DotA 2, and has done plenty of interviews with Valve in the past? Game Informer.
What gaming publication said, at the beginning of 2010 that there would be no Half-Life during that year (which they got spot on), and even implied the next Half-Life may be “Half-Life 3?” Game Informer.
You get the idea.