The info graphic below from LineShapeSpace.com lays out the trends of the BIM industry. If you are in the Architecture Industry and you have not learned Revit yet, YOU NEED TO! Below the info graphic states that "62% of BIM users surveyed say they see positive ROI (Return on Investment) on their overall investment in BIM." They didn't ask me, but I would agree 100%! So now the percentage is now more like 62.0001%.
To begin learning Revit, start by reading this brief "Starter Guide", and download some free templates.