I took my Terrain in today and had the recall work performed. My initial impression.....it worked. However, I need to wait until tomorrow morning to hear it at start-up. Hopefully, no grinding sounds. The service adviser was very good at explaining the why's and what's of the service.
When I left the dealership and pulled into traffic I noticed an immediate improvement in pickup and smoothness. I then switched to "econ" and the results were good. Shortly after, I got on interstate and performance was still better than before.