I am not the best authority on this, since I studied Salzedo technique, too, but I
work with harpists who use the French technique. It seems that the fingers are
straight, not curved, the gestures are down, not up, and there are some very
different fingerings used. There is a video available of Grandjany’s method,
which I have seen advertised in the American Harp Society journal. Check the
Internet for sites on Marcel Grandjany, Lily Laskine, Jacqueline Borot, and
Henriette Reni?. There is probably lots of info there.