They aren't being leaked!
LittleBigPlanet 2 was in a full article in gameinformer.
Killzone 3 is going to be in a full article in GamePro.
A leak would be from someone not working for Sony that gave information without Sony's approval. Remember a month or so ago Jack Tretton (President and CEO of Sony Computer Entertainment America) said that he would like to have Killzone 3 at E3 but wasn't sure it would be ready.
The PSP Go was leaked, because Qore's release schedule wasn't in sync with the E3 announcement.







