I just read Virginie's article and I want to add my bit.
In reading it, I thought to myself that that since emails, Sms, FaceBook, Twitter have arrived in our lives, messages have become totally confusing.
So much room for misunderstanding and misinterpretation !
Writing is a good thing, but where is the other part of the meaning of a text given by the voice ? Emotions, intentions, feelings, even silences ? 
For instance, a mail can be written with an "x" mood and be felt with a "y" mood.
Unfortunately, I've been a victim myself.
So, communication with 140 characters !

The Voice speaks.
It is the other 50 percent of the message .
But you can't hear the depth of my thought.