Yet again, JAM hits the nail on the head.
I didn't go to a cut throat school for rush by the definition provided here, but your analysis is still accurate. In fact one of the 'top' sororities rated the rushees from 1 to 5 for looks and 1 to 5 for personality and ranked them for their bid lists. They wanted a pledge class made up of perfect 10s. That's what they usually got, too. One year they had 31 beautiful freshman and one sweet and nice but normal looking pledge. She was a legacy.