Now I thought that if the blade caught on the nail this showed the bevel was set and the edge had started to slightly cut into the nail. If the blade passes smoothly over the nail the bevel is not set.
I've used this bevel set test on each razor I've honed and the shaves are always good if the blade grabs slightly at the 1k stage.
I'm with you Anthony, this is my understanding and how I use the TNT also
I also am sure Livi on one of his videos actually intentionally sets the bevel then rubs the edge on a piece of horn to smooth it before moving to final honing stages to ensure a smooth edge.