User blog comment:Fandyllic/Diablo III open beta to start no later than Sept. 30th according to SC2 forum MVP/@comment-76.185.6.231-20110730033448

I believe you are misinterpreting this information. I've been on both the official forums and Sixen's website's (diablofans) forums, so I know him well enough. My point is that we given an official beta WINDOW of "Q3, or between June and Sept. 30th." He literally meant *BY* sept. 30th -- not ON -- because that's when this window ends.