I wanted to apply for Spring 2013, BUT I didn't pass the critical thinking test so I moved my application for Fall.. =/ So I submitted my application in September 2012, but it wasn't complete. I still needed one letter and I retook the critical thinking on March 28 2013. I don't think that submitting your app right before March 31st will affect your chances of getting in unless you submitted your app after the final deadline.
My friend got in last year for Fall 2012, She said she got her acceptance letter in May. My other friend just got accepted for Srping 2013. The deadline for Spring was November. She got her acceptance letter in February 2013. I think it takes a couple months to hear back from them.
So my friend said the interview is like a job interview
. They really just want to get to know you. Also, after the interview, there's an essay that you have to write about yourself. My friends both think the interviewee is very nice! So don't get intimidated.
It may seem like a long, endless journey, but we BOTH will get there, soon!