Great Question Greg - I've often wondered the same.
 
I got credit for 921 QSOs out of 926 for CQWW
 
.1% (1) incorrect and .4% (4) not in log  - lost 1 zone which really 
hurt.
 
Score was dropped 1.7%
 
Logging makes a big difference - in the ARRL DX contest KS1J and I were 
only 771 points apart out of 1,009.785 ponts or .07% (less than 1 QSO).  
Don't know who had the best log yet.
 
Best - Jere
KT4ZB , Savannah, GA
 
 
In a message dated 8/27/2011 4:30:44 P.M. Eastern Daylight Time, 
gregpotter@charter.net writes:
  Hi Folks,
  What would be a good "error %"  in a contest like CQWW CW? 
  
  % Calls copied incorrectly?
  % Calls not in log?
  Is there a club competition for "most accurate logs" or "least 
  accurate logs"?  
  How good is good and how bad is bad?  Is perfection really 
  achievable?  
  73 de Greg NM2L
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