If I don't specifically add the Windows System Assessment Tool process (winsat.exe) to the exclusion list, will I get a skewed set of results?
It shouldn't skew the results substantially, but could - I suppose - under some circumstances. When it does affect the results, it would be marginal in most cases. I will go ahead and add a hard coded exclusion for this ..
This process is now excluded by default in 6.0.1.95 beta and above.