what is the definition of a "top tier" uga sororit

Girls have wealthy parents? Girls went to private schools? Have lake/beach houses? Do all the sisters have blonde hair and look like models?
Do they have socials with frats whose members come from families with money and they don't have them with other frats with nice guys from average families? Do they look down on girls in other houses even though they have a closer sisterhood ? Do they judge each other and talk behind each other's back? Just wondering............