Having ridden the front a shocking boat many many times on the Clinch, and seeing how effective it can be at getting a good understand of what is around, I believe them. The Caney got so much pressure last year, and is much smaller then the CLinch, it is easy to see how they could be gone.
When we used to shock the Clinch 3 nights a week, we would turn some massive fish. Biggest two being 33.5 lbs and 34 lbs. This was back in the mid 90's, and I do not think that there are as many that size as there used to be.
With that said, even though TWRA took a baby step forward, we are still a long way away from properly managing our tailwaters.