I'm the opposite because I find Facebook useless since you need to "friend" people you already know before you can really do anything with them.
Twitter, on the other hand, is useful constantly. I was going to an attraction on Sunday that I knew would be busy. (And was an hour drive away.) I searched and found someone on Twitter who had tweeted about being in the line. I asked him how long it was and he told me "about 30 minutes."
So I felt safe that it wouldn't be a super-long line and I decided to go.
Google can't tell me that. My aunt on Facebook can't tell me that. E-Mail can't do that.
Twitter is an incredibly useful tool for learning real-time information that no one else has. How people can dislike that sort of utility really does confuse me.