what to expect?

How does rush usually go for the average girl going through recruitment? I know rush is different for each individual girl, but just want to get a general idea how things go for most. Do most girls get quite a few houses back after the first 2 days? If you only get a few back after the 2 days should you panic? I am from out of state and dont know that many girls coming into FSU. How are the sororities able to make such quick decisions on whether to keep a girl or cut her? Thanks for any input in advance.