Old-Fashioned, that's a PERFECT example of the tulip at its most open; they often /usually hold the fingers and thumb closer together, though still distinctly separated. Nelli Kobakhidze (here's a link to Danish Ballet Journal http://www.dropshots...03-08/23:29:26)
has this to a beautiful degree. It's a Bolshoi thing, and I wouldn't be surprised (though I do NOT know) if it were a holdover of Moscow ways that orient more to Asia than to Europe.
I remember being told by a Javanese dancer that they have several versions of their sacred dance, the bedoya -- on a scale from ritual to theatrical, the most sacred version, the dancers keep their hands "like closed lotus buds,' and in the most theatrical, the hands are hyperextended, like hte full-blown flower, fingers actually curling back.
I've been taught in the other, the St Petersburg-based Ballets Russes Franco-Russian tradition, just like you; in fact, my teacher corrects our hands by having us drop the arm, relax everything, let the hands swing, and look at the finger-groupings -- now raise that to second positoin -- that's it, she says. It does seem to be what the hand does when it's most liquid and relaxed.