I suspect that some OUIs in the polling are also NON's (those cowed by political correctness). Here's to NON winning big time.
You are right, while it might be close, I would not be surprised with a blow out loss due to:
1. Some oui in polls realling being nons as you suggest
2. Many undecideds being unadmitted nons
3. The rest of the undecideds just not bothering to vote as they are really undecided
We shall see.