Google insight

This graph has been making the rounds as a possible indication of how the NDP leadership candidates are running with a week to go, the theory being that interest (as expressed by Google searches) corresponds somehow with support.

How much credence to give those lines? I have no idea. For the sake of comparison, here is a similar graph for the time period covering the last federal election and here are the last few months of the 2008 U.S. presidential election.