I bought the turbo nocks and completed my own form of testing and they did not perform well for me.

To evaluate them I installed the turbo nocks and a whisker biscuit rest and shot several groups at 20 and 30 yards. I had been shooting my normal setup with vanes and my first groups with the turbo nocks were not as tight. I wanted to make sure that fatigue was not part of the reason that the turbo groups were worse and I also wanted to use facts over subjective judgement. So I shot a few more groups and started to keep score on each group using the 10-9-8-7 rings of a standard target face. I then switched back to my normal arrows and shot a few more ends and the groups looked tighter and the total score was higher. I then repeated this over the next few days each time switching back and forth between the turbo nocks/whisker biscuit rest and my normal rest and normal vanes. Every single time I shot better groups and scored higher with the vanes. I did have the exact same length and spine on each set of arrows.

This testing was enough to convice me that I was not interested in switching to the turbo nocks. I am confident with my setup that they were not the best choice for me. Now I will say that maybe with a different bow and/or setup that maybe they work great. I did not try a drop-away rest as I had already spent about $75 on the turbo nocks and whisker biscuit rest which was wasted money and I did not want to spend any more.