In my view no. There are so many persons in my friend list can talk nicely to friends but in the case of delivering information to listener when its happened in public they may go back. But someone doesn't have these friends can easily talk with public. And also there is many others are opposite to it. Anyway I think that its depend on the training what he get from the home.
تحية طيبة..،بالتأكيد هناك أواصر تربط الشخصية بقدرة الفرد على إيصال المعلومات إلى المتلقي ولاسيما إذا كانت تلك الشخصية في مضمار العلم والطبقة التعليمية على تنوع مراحلها
Although a very specific example, this is very good:
Teachout, D. J. (2001). The relationship between personality and the teaching effectiveness of music student teachers. Psychology of Music, 29(2), 179-192.
Article The Relationship Between Personality and the Teaching Effect...