Doesn't matter whether they think it required "superhuman skills" or not. The infamous Pilot Error label sometimes does not take into account certain conditions in which we do not have the time to react. Case in point, you are probably familiar with this one, the TWA DC-9 in BNA in '99.TWA Dude said:I don't understand your argument. The NTSB, not me, determined that the pilot failed to correct for the autopilot's pitchdown. They apparently didn't think such a thing required "superhuman" skills.
Don't forget, the NTSB also blamed Sten Molin in the A300 NY crash, despite never having affirmed whether the rudder pedals were moved by him or by some yaw damper runaway.
How about them blaming Hoot Gibson in the '79 727 altitude upset? Nobody believed them back then either.
NTSB rulings sometimes must be taken with a grain of salt, and an understanding of human limitations in certain conditions.
I think it'll be easy to understand what went wrong in DEN, however.