No, I do not know of anyone.
One of the things all lawyers agreed upon was that the officers at local offices are not very experienced in handling EB applications. One lawyer said the following:
"there are about one million GC applications processed every year, mainly family based. Only about 50,000 EB are processed yearly. Most of the EB applications are processed in service centers, and only 5 to 10% is transfered to local offices. Thus, only 2500 to 5000 EB applications are transfered to local offices all over the US. A small portion of this come to Houston. THus the local officers here in Houston, would have seen very few EB applications and they are not familiar with the differences. For example H-1B is a dual intent visa, unlike B-1, F-1, and so on."
So, when you go to the interview, be prepared with this backgroung in your mind. I do not want to scare you, but I am just sharing with you what I have gone through, and what the lawyers have told me.