Yes, that's exactly it. She's doing a conjuration that makes sense in terms of the story she's trying to tell. It's wonder-full and we flow and glide and dive along with it. As safewrite said, in service to the story.

I don't always manage to walk that line myself. I'm always reining myself back in. It's beautiful to read when someone uses it so expertly. But the other stuff, the pyrotechnics with no purpose but to say, "See how brilliant I am and all the sparkly words I can use!" doesn't really burn. It freezes.