According to Final Fantasy XIV producer Hiromichi Tanaka (rough translation):
“We understand the wrath of players and developers are sorry because they did everything they could to have a simultaneous release date, but unfortunately they have encountered many technical problems on the development of the game for PS3. We strive to release the game as soon as possible. If possible, we would publish the game sooner, we would like to start as soon as possible the beta on PS3.”