All news sources and the CBSA notice on canada.ca seems to support the fact that all Foreign Nationals that are immediate family members of Canadian citizens or PR holders can travel from tomorrow. It's only the CICnew.com that's saying otherwise. And the minister said it once... but clearly as stated by others, is a mistake on part of the minister. CBSA is usually the one overturning anybody else on matters of who can enter and who cannot. Even JT's ahahhaah for that matter... and CBSA seems to be mentioning all FN and not just those from the US.
PS. trying to contact CBSA on phone, but the line is busy. So if anybody is able to confirm with them, please post here!