Lakshya,
I am also one of the guys who got approved without a BC.
All I had submitted was the high school certificate that just mentions the DOB and nothing else. However, after I filed I-485, I had obtained all the required affidavits and certificates as I was very sure of getting a RFE for the BC. Interestingly, my case was trasfered to a local office for interview and the officer did not even once mention anything about the BC. The only thing she seemed to be interested in was my current employment letter and my H1B approval notices.