Even the the story is FALSE, it does say that the gal had been shooting shotguns for 2 years or so. Such a person might not even notice the recoil in such a situation.
I expect you meant to post "Even though the story is FALSE..."
The story is FALSE! So, I don't know what the point is. But, for the sake of discussion; You might not notice the difference if you were an adrenalin pumped adult male. But, we're talking about an 11 year old girl. That load has about three time the recoil of a trap load. Yes, she would notice because she would have to pick herself back off the floor.