Here are some experiences with regards to my entire track from NIW I-140 petition to I-485 approval. I had somewhat of an unique case, so if anyone here is in the same boat, this may be of help to you. I have done the entire process by myself, without an attorney, and long hours of research in the law library on U.S.C. Section 8.
Arrived to US in 1991 on J-1, not subject to section 212e, changed to F-1 on arrival. Became an H-1 in 2001 and filed for NIW in March of 2002, case was backlogged due to 9-11.
Based on the advice of some of the members at immigrationportal and being an eternal optimist, I went to Vermont Service center on Aug 23rd taking a dayoff. The lady in the counter told me that my file is in queue for FP scheduling. I told her that I got the same reply even two months back when I made senatorial enquiry.
Today I had my interview conducted, and passport stamped as the final result. I finally can draw a closure for this 27-month-long journey. Honestly and surprisingly, I was extremely calm when I arrived USCIS office 4 am today. I was reading one of my favorite authors' (Ann Quindlen) bestseller " One True Thing" while I was waiting in the waiting room so concentratedly that when my name was called, I realized that my eyes were full of tears (yeah, the story's very touching and real. ) Anyway, here's my detail report to all of you who are still waiting: