Michele, very good explanation.
I have grown TC plants beside field grown divisions of the same cultivar that were directly from the hybridizer. In every case, the TC plants were inferior. I am only talking about a handful of plants, so it was not a large experiment. I don't remember details, as it was at least 10 years ago. I have not knowingly bought a TC daylily since.
However, I think most Hosta on the market are TC. They seem to TC well.