I studied with an alcoholic fornicator who regularly spoke in tongues. The hard line that it is all demon deception has been replaced with a degree of understanding of the psychology involved. People within a group that emphasizes the necessity of these gifts as evidence of divine approval in time aquire these "gifts". It has a great self affirmation effect. There was a WT comment some 15 years ago or so that discussed the brain's power to conceal from the person themselves that they are unconciously responsible for this seemingly miraculous autoglossia/tongues. In this they showed a remarkable moderness and social insight. This objectivity is no doubt due to their being divorsed from the practice themselves.