You can chide the pollsters if you like, but this type of emotionally charged election is almost impossible to predict even a day or so out but certainly its clear you cannot predict an election by simply asking people which way they intend to vote.
Here are a few other closing thought about why the polls got it wrong....
1. Are the types of people that slam down the phone if a pollster calls and would never think about doing an online survey also the same type of people who might be more likely to have voted for Trump?
3. Clearly Hillary Clinton did not motivate here democratic base to vote in the same way Trump rallied his supporters and so the polls which are often weighted by past voting activity were delivering a miss read
2. Likewise did weighting polls by traditional political allegiances have any relevance in this election
4. Male blue collar workers who voted for Trump in droves are the hardest group to reach with research as they are working
5. There is some evidence in our research that Trump supporters were slower to respond to our online poll invitations and so some short turn around polls might have closed up before all the Trump supports had a chance to register their opinion.