StatsCan's voluntary survey drew a response rate of only 68 per cent, not the 95 per cent and more that the mandatory long-form census routinely elicited. Are you really surprised? Read the story here:
http://www.thestar.com/opinion/commentary/2013/05/09/canadas_flawed_national_census_siddiqui.html
http://www2.canada.com/nanaimodailynews/news/story.html?id=56b74297-620b-4b41-85f5-afc88b1688d7
