I am very skeptical that one can train a vice to remain at that high level after puberty. I never heard of such a training before. Why did they surgically create castratos in the past if you can just train your voice?
Did you even listen to the videos? I'd say those qualify as average male vocal pitch.
*My signature from 2011 which I'm too lazy to change*
Currently awaiting the arrivals of:
Kid Icarus Uprising
Resident Evil: Revelations
Tekken 3D: Prime Edition
Metal Gear Solid: Snake Eater 3D
Beyond the Labyrinth
Heroes of Ruin
Luigi's Mansion 2