For nearly a century it was only possible to find out what the general public thinks with traditional polling, which costs thousands or even millions of dollars

For nearly a century it was only possible to find out what the general public thinks with traditional polling, which costs thousands or even millions of dollars/euros. Since the rise of Web 2.0 Social Media analytics has been increasingly popular. A lot has been said about the predictive power of Twitter so far. According to some people you should be able to predict flu epidemics, unemployment and even riots/revolutions. What about Elections? I have tried to predict the outcome of Turkish General elections of 1 November 2015 using Twitter data and I believe I will be able to predict quiete accurately. Within a few percent.