"This is not just people changing their voting habits it's people being mobilized to vote."
Ms Harre said a significant factor driving higher advance voter turnout was that this was the first election in years held during the university and polytech term.
"So the fact that students are on campus, that there are polling booths on campus, and that there is political activity on campus is going to affect the youth voter turnout I'm sure of that."
The Electoral Commission was yesterday unable to provide data on which advance voting places were seeing the biggest increases in advance voting.
Ms Harre said the rising proportion of advance voting was likely to force the election day ban on political advertising and media coverage to be examined in the regular post election review.
"Obviously it becomes less and less meaningful the more and more people choose to vote early."
Chief Electoral Officer Robert Peden yesterday said any change to the Electoral Act, including the election day ban on advertising, and media coverage including social media and online material "is a matter for parliament to decide".
Mr Peden said the strict rules banning election advertising such as the display of signs and the holding of demonstrations or processions on election day did not apply during the advance voting period.
"However, parties and candidates are asked to exercise restraint in and around advance voting places to avoid complaints."