It depends. Not sure yet what they did about a foundation, but a couple of clues are "The building is said to have been constructed with pre-fabricated materials, including 200 tons of steel." and "200 workers". Most projects I knew at my last job only had teams of some 5 at a time, so the many hands bit makes it interesting.
And the Pre-Fab part, if it's for example huge blocks of pre-built modules, you'd save a month each because you just slot them together like lego-type blocks.