Hi bradap, thanks for your question.
If you've earned 4s and 5s, I would not shade downward just for the appearance of fairness! Your recommenders should also have answers for leadership areas on which you can improve, so it's not as if the admissions committee will not get a full picture of your abilities.
My guess is that most recommendations shade toward the complimentary side. If your recommenders believe you've earned those scores, then accept them!
Best of luck!
mbaMission Insiders Guides: http://www.mbamission.com/guides.php?category=insiders
Free Consultation: http://www.mbamission.com/consult.php