[Zageron]

You know if you FC all 1 - 10 difficulty songs your average rank would be about 300? (Estimate that's probably accurate.)
The scoring system doesn't care if you have 100 goods, 40 averages and 700 boos. You are still going to get the full combo.

Average rank is not a good indicator of skill level. (But AAAs do so u all suck >.>)