Anecdotal evidence. I live in a fairly low tech central/eastern European country, but I know a lot of people that use Facebook and IM, most of my colleagues us

Anecdotal evidence. I live in a fairly low tech central/eastern European country, but I know a lot of people that use Facebook and IM, most of my colleagues use Linkedin, but only some use Twitter. If an event isn't on Facebook it could be invisible. SMS is common for a decade now. It depends on a lot of things, exactly why this blog post has little sense.