I got my first rejection letter from the material I submitted to agents from the agent pitch slam last week. It came as a form email, so there wasn't any useful feedback in it. I'm not too broken up because I would have guessed that if anyone rejected my material this agency would as they were less excited than the other three when requesting material.
So I'm still waiting on responses from 2 submissions, and I still need to submit my full MS to the final agent that had requested material.
I'll keep you updated.