Yeah I agree with most of this. As to 15 degrees...??? I don't know and don't believe it is of much importance as to what the degrees are. My instructors never used a protractor to measure. We tend to pivot the feet inward to the point of having outer edge of the foot pointing straight ahead. The inner edge then projects the sides of a triangle. The knees are bent to the point the distance between them are approx. 2 fists apart. I am assuming those that use the more intense pigeon toed stance with the knees squeezed in as KPM describes are doing so more as an 'over training' in the beginning stages and they use a positioning much closer to natural in the more advanced stages.