You can find the original article on the gene discovery here . And an editorial on the discovery by someone called Simon Fisher ending with the following questions
Are mutations that affect this pathway present in independent cohorts of people who stutter? Why would dysfunction of a basic process found in many cell types selectively affect the neural circuits involved in speech fluency? Do other undiscovered genes associated with stuttering have roles in metabolic pathways? Can these data explain whether early stuttering will persist? Are there new prospects for treatment? As with other neurodevelopmental disorders that affect speech, the task of connecting the dots between genes and stuttering is just beginning.