We have evidence from the labour force survey conducted by Statistics Canada in October, right after the election. It showed that roughly 170,000 electors did not vote because of issues regarding their ability to establish their identity, mostly for lack of an address. It's interesting, because in that survey it also shows that 50,000 of that 170,000 showed up at the polls and were turned away for that reason.
That's the evidence we have at this point. We know from past experience that it has been useful for specific groups to rely on the voter information card to establish their address.