This is the article I found where they mentioned the use of revit for the precast panels.
http://blog.archpaper.com/wordpress/archives/24261. However after looking further I found a blog by Morphosis and their IT department
http://synosis.org/ reviewing this project and from one of the pictures it looks as though it was started in GT digital.
Thanks for the alternative approaches to this project in revit. But I think you are correct when you said the pattern and the panels are modeled in something else as the sweeps on the panels are continuous across different panel geometry. I have a feeling the bulk of the modeling was done in gt digital all the way to fabrication for the precast guys and the rest of the project was documented in revit.