I don’t think the polls will be completely honest. They can be wrog on purpose ONCE, agonize over why it was an outlier, and still get business next time around. MAYBE, some upstart who gets it right will break into the upper ranks on that basis.
Also, it is HARD to get polling right when many people hang up the phone, lie, or say they are going to vote and then don’t bother.
If the line is 90 minutes long, who goes home first, the “Not Trump” type or the “Not Hillary, and hell yeah Trump” type?
The news networks and other groups who sponsor polls are always ready with excuses as to why they were off. And it's never their fault. Typically, they'll blame the turnout- either higher and lower than expected.
It's kind of like a bookie operation. It doesn't really matter who wins or loses, only that they have people willing to put money in from both sides.