Definately a life skill.
Around 10 years ago people started seriously considering 'Emotional Intelligence' (EQ), as equally imporant as IQ. eg knowing how to act in certain situations, empathy, understanding peoples' behaviour, minipulating situations to your favour etc etc
There are now fairly well established EQ tests, and it is widely covered on psychology courses, MBA courses etc.
My feeling is that people with high EQ generally make good poker players (as they tend to be more observant, more patient, better at reading people, better at picking up subtle behaviour changes, and have better self-control).