Brink launches April 12th 2011. I got this information from Gamespot on the Brink page, because on the side panel it clearly says 'Release: Apr 12, 2011' Click http://www.gamespot.com/xbox360/action/brink/index.html .

Im assuming its official.
P.S. I know this has already been posted, but i opened this topic, to discuss if people think this is official. What do u think? I think its real, because I've never known Gamespot to post faulty dates.

Unless you can point to an official press release or similar source I see no reason to assume this is in any way official. Just like stores game sites like this routinely put up placeholder dates that are nothing more than educated guesses.