While he likely was briefed as to responses and background info on the questions, he was always a gentleman, and always kind to contestants who got answers wrong and who got wiped out. He also encouraged contestants, complimenting them on their knowledge in an area, or when they were on a roll.
Definitely enhanced the game as an academic pursuit, and not matter your level as a viewer, for viewers watching, made it interesting.
His son bought a brownstone in Harlem, and he helped renovate it with his own two hands. Kind of cool. A great Canadian, like RMN.