During our i-140 process we had received an RFE, enquiring why I had not reported under NSEERS. My country of origin is one of those that required NSEERS, but I had relinquished that citizenship and am now a citizen of a European country. We had responded successfully to that RFE and our i-140s were granted.
I later found out that the very reason our cases were transferred for an interview was this very same question. At the interview, the officer asked me to provide evidence as to why I was not subject to NSEERS. I provided the same information I had done before - documents that showed I had officially lost all ties to my country of birth. However, the officer was hesitant to make a decision on this, and chose instead to refer it up the ladder. Then something happened, someone freaked, and I got a NOID. My attorney went at it (he is more expensive than everyone else, but worth every penny) and spoke to a senior officer, provided the requisite evidence again, and our case was approved.
Maybe this information might be helpful to you. From what I'd heard, most of the cases that are transferred are because of some prior arrest history. If you've had that problem, you should be prepared with all the documents.
