"emails may simply be too long or too stuffy for daily, non-professional communication"
Nah. The reason is no-one wants to log in to two things. People who start out most of their online life on a social network aren't going to want to log in to a second thing (email account) to communicate.
I started out on email, and don't want to log in to a second thing (Facebook) to communicate. I let Facebook notify my email when it gets a message though. I didn't want to get into Twitter, but Buzz fit into my Gmail habit (and can even link to Twitter).
Nah. The reason is no-one wants to log in to two things. People who start out most of their online life on a social network aren't going to want to log in to a second thing (email account) to communicate.
I started out on email, and don't want to log in to a second thing (Facebook) to communicate. I let Facebook notify my email when it gets a message though. I didn't want to get into Twitter, but Buzz fit into my Gmail habit (and can even link to Twitter).