My situation was same as yours (the_hareeb, F1 turned into H1B, worked on SSN). I got mine stamped recently (last December). Due to high volume of students during that time, my interview was scheduled 2 weeks after the applied date. The interview itself was 2 minutes long (had to wait 3 hours there for my turn to come since they were interviewing the students first). Questions asked were how long you have been working there, how many people work in your team, etc.

Another thing I came to know about was while applying for my H1B, I think there's a box where you specify who should be notified if your petition is approved. I had Consulate at Kathmandu there. Which means a PIMS database at kathmandu already had a record of my I-797. I believe that's why I was not told to wait for PIMS verification (normally takes 2 days according to what I've heard).

At POE (Chicago), I wasn't asked much. We just had a normal conversation ( I forgot the specifics) but only took me 4-5 mins ( the guy was slow as hell and took time to staple I-94 on my passport).

I guess it depends upon people but mine went smooth.