Bump. Good to see this thread back with new information. I still have an academic interest in this topic. Fun to read through the old posts. I'd forgotten all about this. My guess about the pro girl would be that her coach allows her to open her hip angle in the climbing simulation.

My spin class instructor has us do a fair bit of work at high and low cadences in TT position and similarly a lot of flat back work out of the saddle. Off the road like that, I've been able to work on my muscular recruitment in those positions and cadences. It's interesting how much one's pedaling mechanics have to change with changes in rider position as well as cadence.