Thanks for clarifying.
Mine does sound slightly different. I can't push the pedal down at all. I feel the actual pedal flexing when I push, but I can tell nothing is happening with the actual throwout bearing and pressure plate.
It just happened suddenly in my case. Before that, she was driving nice and smooth and I could floor it too without any problems. I have had loose motor mount problems with other cars, so I didnt observe those symptoms with my XF before this happened.
Well, at least now, I feel confident we do have two different problems.
Thanks again for the update!