OK, concluded my assessment of recent mafia games. I had to take into account only non-griefed mafia games, which was a bit difficult, as all the most recent ones were griefed by NmaGane.
I am saddened to report that LBJ has 0 wins. That puts him at a 0% winrate.
Nyte managed 1 win out of 3 games, which means my assessment was accurate: 30% winrate. It gets worse, though - in at least one of those 3 games she was actually awarded Least Valuable Player.
Jury is still out on who was the least valuable player of the other two games but the preponderance of evidence indicates that it could very well be Nyte (I guess only if LBJ was not playing).