The same blog has a whole series of posts on running technique, much of its opinions supported by the scientific studies: http://sportsscientists.com/running/running-physiology/runni...
Read this. There's a ridiculous amount of pseudo-science, superstition, and hucksterism around running technique. Without becoming a quack myself, all I can say is "be patient and don't make any sudden changes."
The same blog has a whole series of posts on running technique, much of its opinions supported by the scientific studies: http://sportsscientists.com/running/running-physiology/runni...