The turnover pass is a pass done in the hands before tabling the deck.
What Daniel calls a turnover pass in
ONE is not what you'd typically call a turnover pass.
Nevertheless in the pdf it's called a
"Turnover Pass", if the sleight was created before it's probably got another more
(typically anyway) suited name like
"Slip Switch" or something. But, as Daniel has pointed out numerous times, he's aimed to keep out of the commercial magic world so the material he comes out with is from himself and for him is original
(whether it's been done before or not).
Hope that helps a little.
- Sean