Thanks guy, you are the MAN. I went through USCIS site and it said AAO processing time is 36 months.
http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=8ff31eeaf28e6210VgnVCM100000082ca60aRCRD&vgnextchannel=dfe316685e1e6210VgnVCM100000082ca60aRCRD
Didn't know about other facts. I applied for Master already and taking class from fall 12.