I have major doubts about it being faster. Concrete forms for a standard house can be set up in a few hours with a small crew of 5-10 people. And with a line of concrete trucks it can take a few hours to pour the walls, the forms are usually removed the following day, and the walls are useable immediately. From start to finish poured walls can take 1-2 days to set up and pour.

The article says it will take 330 hours to print this house, which is way more time then it would take to set up forms and pour concrete walls.