Originally Posted by Corwin 
How can 3/5, 60% be a fail?
Well, in the US:
90 - 100 is superlative
80-89 is very good
70-79 is average
65-69 is below average
less than 65 is failing.
And since I'm a optical engineer / physicist and also a statistician, I had a hard time letting go of my inherently structured and overly-detailed analysis of games.