Quote fromBlizzard is not slow at developing games, they just want to make the most possible money by releasing them at different times.
Guaranteed the main reason Diablo 3 will not be released this year is because of World of Warcraft Cataclysm. Blizzard knows or thinks that if they released Diablo 3 before that, people will quit wow (and their monthy payment) and play Diablo 3 instead. So what Blizzard has most likely done, is given the Diablo 3 team a large amount of time to develop the game and set a release date for some time after Cataclysm comes out because they think less people will leave WoW after this Xpac comes out. Do i like it? no Do i think blizzard cares more about money then their fans? of course.
I have 2 words for you, just 2 words: