Recently completed an interview for a mid-size firm that was a nice talk, though I'm not sure how well it went. Continually commended me on asking certain questions and then would say "That's a great question to ask on interviews!" Maybe he was just trying to rattle me.
At the end of the interview however, he asked for a copy of my writing sample (which I gave him) and gave me his card.
That hasn't happened on other OCIs I've gone on yet. Is that a sign of some sort? Should I send a thank-you note despite the school having a moritorium on those following OCI?