A recent poll found that 43 per cent Ontarians believe parents must both be informed and give consent of an identity change, while 34 per cent said parents should simply be informed. About 16 per cent of respondents said it should solely be up to the child.

I think they are referencing the Angus Reid survey found here The number of retards is 23% in places like Atlantic Canada, but only 10-11% in places like Saskatchewan and Quebec.