What is the aerodynamic advantage to a cuffed wing like the Cirrus SR-22?
Here we go:
http://whycirrus.com/engineering/stall-spin.aspx


  Spin Prevention
  Cirrus chose, in the very earliest stages of designing
  the SR20 to take on the challenge: to minimize the risks associated
  with inadvertently stalling an airplane. The approach chosen was to
  employ wing technology developed by NASA reducing the potential for
  spin entry after an inadvertent stall. The most visible aspect is the
  discontinuous leading edge dividing the wing into distinct parts.
  ...
  How does this wing design work?
  The outboard section of the Cirrus wing flies with a lower angle of
  attack than the inboard section. When the inboard section, which
  produces much of the lift, stalls the outboard section, where the
  ailerons are, is still flying. The result is that a stalled Cirrus
  airplane can be controlled intuitively using aileron.