I agree with you. Furthermore, I think, the interrupt stance doesn't prevent you from attentively listen to what others say. You can absolutely listen a person talking for a long time. The opposite not being true.
However in an educational context like described in the article, if think that waiting for the other to finish is better as it allow a better analysis and criticism of the whole argument development.
However in an educational context like described in the article, if think that waiting for the other to finish is better as it allow a better analysis and criticism of the whole argument development.