My experience with Parvus is pretty old, but I saw the name in the thread title and thought I would share. I submitted one of my MS after seeing them on reddit in 2016. I received a very personalized response from Colin less than a month later that included the editor's notes. It was very kind and emphasized they wanted to see future work from me. I haven't been down the small press route again for later manuscripts, but they are definitely on the top of my list if I decide to try that!