High tech, high touch! The rise of social networking reflects and reaffirms human needs for social connection. YouTube adds to that the visual element. Now we can be seen and heard via 320X240 pixels, unlike the television screen which projects larger image (Peter Jennings used to do a news stand-up from the balcony of Caravelle Hotel in Saigon with just a sport coat and a tie while still wearing shorts).
On the other hand, telemarketers were advised to dress up so that every cold call comes across more professional.
Which is true? Maybe what ever means that exudes the most confidence and generates the most amount of trust.
I would add self-revelation to the mix, to catalyze the viral chain of reciprocity. High tech needs high trust!