"Turncoat" by Steve Rzasa.The prose begins a bit... dry? It made me think I don't really like short stories. Then the story picked up, and I remembered that I do like short stories (I just like long stories more, because there is more of them to like). I smiled at the mention of "Saint Kurzweil". The plot twist is entirely given away by the title --- lack of imagination there? or straightforward authorial titling, like artists who call their art "untitled study in blue #3"? --- and the conclusion was cute. Not terribly thought-provoking, but a fun little verbal romp in the world of uploaded-humans-and-AIs versus non-uploaded-humans.
If this were the first chapter of a book, I'd keep reading.
This post's theme word is adumbrate, "to foreshadow" or "to give a rough outline or to disclose partially" or "to overshadow or obscure." The monolexical title adumbrated the conclusion.