depends. If its a good key for me, then I'd probaly say nothing. If its a hymn or other popular song, then I'd say nothing.
But if its a very complicated choir song, then I would expect that it be done the way we practiced it, and I'd let him/her know that I dont appreciate that.
Some songs I can do in every key without much practice, but If I memorize a song, then I'm gonna struggle playing it in another key without warning, or it will be watered down.
Was your keyboard player using transpose? maybe he didnt know he was doing it in the wrong key.