Well I can only speak for AFROTC. You're going to have to put some time in before you see the results. Unless things have changed you are not going to find out if you get that elusive pilot slot until your Junior year. I didn't find out until my spring semester. I did a 3 year program so I was in for a year and a half before I got the good news.
I could try to pass this off as my own, but it's not. Check out this site and it pretty much spells it out for you.
http://www.wantscheck.com/PilotSlotR...0/Default.aspx