It's a put down, I know, but I think it applies here. All boards have their lower quartile and upper quartile and the
big middle. Often, the best and brightest post very seldomly (think H2OMan and the Magistrate). And sometimes the louder (and more frequent) noises come from the lower quartile. That's how it worked in my classrooms back in the teaching days. NB: "Lower" can mean a measure ...