This reminds me of the story summed up in this quote:

  There was no such thing as an average pilot. If you’ve designed a cockpit to fit
  the average pilot, you’ve actually designed it to fit no one.

Good enough source here: http://wmbriggs.com/post/18291/

Humans form a very high-dimensional space. I'm not sure what to make of the point about orthogonality in that regard.