[pinkyphimu]

here is my two cents....

the schools that have twice the number of legacies going through rush are also those that:
-have "rules" that only take women from certain towns/ states
-people know you, your family, your pets, etc. and you couldn't hide your legacy status even if you wanted to
-are located in places where women are groomed for recruitment from birth...even their teachers say things like, "if you want to get in to a good sorority when you go to college, then you won't XYZ"

i also think the numbers are a bit inflated. patty pnm might be a legacy to kappa from her grandmother, chi o from her mother, and phi mu through her sister. one pnm counts as a legacy to three groups. there are probaly many women going through in the same situation, so....of course groups can have more legacies than quota.