Good points maggieaxid
As stressful as rush is for the rushees, it's so much more stressful for the chapters. We have to decorate, clean, cook, vote, etc. etc. and keep a smile on our face all throughout rush. We start hours before the rushees come and end several hours after they leave. It's tough as hell, similar to bootcamp :O) So sometimes if a girl seems out of it, that may be why.
Wait until you're on the other side... you'll wish you were a rushee again! Rush is fun but you feel like you got run over by a train when it's over