Not only once. He started off his contribution on this IRL day by first reading up, asking why he was on the chopping block, and then agreeing that he was the best lynch for a while. Only recently now has he started really pushing at anything else.
It was only a small worry, and I'll still put my vote on the russian roulette even if he is a Jester, but it was a theory/feeling I was just starting to form.