As the majority of the first world is now populated by cyborgs (with mobile phones, laptops, PDAs and various other equipment on and around ourselves each day), I would say that we have two forms of social interaction now. Both are the same, but they are at different stages.
While chatting with people on the internet and conversing involves the fundamentals of being social it lacks many of the factors that make up our communication.
Speech is just one of the many ways we communicate, by typing we lose out on the other factors, such as emotion and the communication that we do with our body language and expression.
For me I think that being social requires all elements of our communication and I don’t think that instant messenger will do that just yet.
Maybe internet chatting in the future will bring all communication factors into play.