Many people have a specific way they prefer to share or receive information. Some of them feel more comfortable to actually let people hear their voice, others are getting away as possible from talking in front of a group. In my case, communicating electronically makes me have more confidence to share all I need to explain. I usually email what I need to share in a way I can easily take my time to formally write with precaution which allows me to revise over and over before sending the final copy.
Fabrice Douillard