This supports deeper reflection. Delay can cause a loss of momentum in initiatives. Posting messages and the process of dialogue is a public act. This provides an audience and can hone skills in clarifying assumptions and constructing arguments. Some people feel vulnerable to an unseen and potentially critical audience.
Active participation is rewarded.
This provides opportunities for developing new skills eg self-directed learning. Passivity and isolation are still deeply ingrained for many people. New opportunities for effective dialogue and networking are afforded. Conferencing and chat are currently primarily text based. Communication flourishes amongst verbally oriented people.