> occasional cases of disproportionally high percentages that give the appearance of outliers.

This. I've asked Jazz if he could add number of self votes into the profile command once he's on his leisure time to code. In the effort to find a magic number that tells it like it is, I ended up finding more reasons to not immediately believe what the numbers tell. 

Like it's natural to see a name on the top 10 of some account but that name posts often more than the others so it's understandable they rank higher in %.