Many people consider the election is already over. At the same time, most polls are reported without the number of undecided voters`mentioned (Galt knows why, since the number is always significant).
Checking the figures for the most recent poll, the Herald's Digipoll gives the point some context -- 110 of the 770 people polled were either undecided, or would prefer "none of the above." Here's the 770 responses in order, with the "undecided" group ranking third:
27 NZ First