Agreed. I suppose if I *had* to measure intelligence, I might
  consider insight to be a measure of intelligence whereas
  consistency might be a matter of being able to perform a
  particular learned skillset on demand, such as test-taking.

  Then again, I suppose insight can also be a learned skill as
  well. It *is* something you can practice - awareness of
  opportunities for worldview shifting that can reconfigure the
  variables to suit viewing information from multiple perspectives
  simultaneously.