According to the dev team, the delay is due to the simple fact the game is not ready for a November launch.
"We know a lot of you are probably wondering: Why now? We struggled with whether we would delay the game. But from the beginning, we have adopted the attitude that we will not compromise on quality. As we got closer to release, as all the pieces of the puzzle were falling into place in our last push before completion, it became clear to us that we needed to take the extra time to polish and fine tune each detail so we can deliver a truly memorable and exceptional experience," the team stated.
Watch Dogs is due to be released for PC, Xbox 360, Xbox One, PlayStation 3 and PlayStation 4. The game would have been a launch title for the next-gen systems.