Yup, Paul hit the nail on the head on the explanation of oil viscosity. In my oppinion, the stock shock oil is WAY too thin.
I use 10 weight oil in the shock, and run my clickers at 14 for compression and 10 for rebound. I HATE to have too much rebound, and do not jump off cliffs or tripples with the 500. Also, my shock has been revalved by ACME, but even with other bikes with stock valving, I have always used 10 weight. Did I mention I HATE to have too much rebound? Scares me....
On the forks, I use 5 weight fork oil.
Rick