Of course, there will be the inevitable posts by those who say ‘I remember the same refusal to believe the polls when Obama won’ etc., but IMHO nothing matters except the final vote count, and it has always been difficult to know whether the polls reflect the vote, or influence and direct the vote. I would say it's probably a bit of both, depending on the poll.
That said, this is an election like no other in my lifetime. The MSM is so in the tank for Hillary, and so anti-Trump that they actually have IMHO diminished their ability to influence the election (because they are so transparent that fewer people are taking them seriously as a valid source of news and discourse). All of this rhetoric has also, IMHO, made people afraid or reticent to admit they are voting for Trump - and this has a very big effect on the accuracy of any predictions.
In past elections, their own party didn’t go after them like they are after Trump. This is unbelievable attacks on one man, Trump. I go way back and there has not been anything like this before. Trump has only his voters on his side of all this. I did not know the republican party was so in the tank with the democrats and even behind the saddest most evil man who ever sat in that office, obama... and against Trump. I knew they were across the aisle friendly, but to turn on the people and side with hillary for president... is beyond the pale. . beyond what a 2 party system is supposed to protect the rights of the people... they are all turncoats and in it for their own power and financial gain... the founding fathers neglected to remember the depravity of man and did not set in term limits for congress!