This is all i have seen so far, still waiting for the official TSN media release and the RDS Numbers.

SUNDAY: #TSN's 5.5 mil #GreyCup overnight total soars past 2011 (4.38Ml), 2010 (4.94M) and even peak year 2009 (5M+)

Record 5,478,000 overnight, estimated viewers tune in to the 100th #GreyCup on #TSN

Source : https://twitter.com/BillBriouxTV