I am assuming (hoping?) that the CX-5 rear differential only gets significant power when the vehicle detects slippage from the front wheels.
The other day, I was waiting for an extended amount of time to pull out across several lanes and go left. Due to construction, there was a dusting of red clay dirt on the road. When the opportunity presented itself, I had to move quick to avoid pulling in front of someone. As I pulled out in a big arc to the left, I rolled into the gas. As soon as I felt some slippage, there was a strong push forward. I guess when the front tire slipped due to the slight turn and dusty asphalt, the clutch sent power to the rear. The additional traction was significant, and I thought about that little ring gear.