Yard Dog, there was nothing in anything you linked that supports polls having a measurable affect on how people vote. That Huffington Post article you linked was based on opinion and that second quote you posted has the word "may" in the quote, twice.
Evidence that polling has little to no effect on voting, how about the 2000 Presidential election, the 2004 Presidential election, the 2008 democratic nomination race, the 2014 kansas gubernatorial election and the 2016 democratic and republican nomination race. Just like your cause yesterday, endorsements, the information age has dealt a significant blow to the affect of these things. There is so much information available that people are self-reliant to make their decisions.