Did the exit polls discourage late voters?

[‼realJohnEwards‼]

Given that Clinton supporters were more likely to believe polling than Trump voters, would many non-voters (especially the minorities in urban areas who notoriously didn't turn out) have come out to vote if they didn't think that Clinton had had it in the bag (as exit polls suggested)? Honestly, given that the earliest returns (when the exit polls might not have had as much of an effect) were good for Clinton, I buy this completely.