[adanthar]

I'd like to point out that both Affleck and Maguire are professional actors who basically get paid to convincingly project emotions to millions of people. (Yes, Affleck comparatively sucks at it. He's still better than I am or you are.)

Given an average run of cards and a decent amount of brainpower there's no reason any actor couldn't do well in a game that's half about reading the opponent.