I've seen a large hen doing the partial strut while I was hunting in Oregon, Tim. Kind of like the one hen in your bottom pic. She was obviously the dominant hen of the group of six - with no toms around that I either heard or saw that morning. She was dragging one wing and making a purring sound as she bullied another hen about her size. It was the second time I'd been in the turkey woods with a shotgun and the whole thing was a mystery to me until I asked about it on the old TSO site and I got the same kind of answers I see on here.
Thinking back, the whole show was pretty amusing - including the newbie thoughts going through my head as I watched the whole show! LOL