^ My understanding is that the adjusters can be used to alter the speed of weight transfer (but not ultimate weight transfer). And thus how a car reacts at corner entry and exit can be modified with shock changes.
I'm checking google for Penske's flow chart on double adjusters but not having much luck...
(no personal experience, though...)
Edit: My god, technical shock info overload:
Start with this:
http://www.penskeshocks.com/files/Adjustable_Manual.pdf
Tons more here:
http://www.penskeshocks.com/Downloads.php
(I was just looking for a damn flowchart...)