Ha! Ha! Ha! Ha! Hilarious! I have some East Coast Canada relatives who do sound a fair bit like that lady. There's a definite "rural" sound in the way she talks, specially the vowells...sounds like a small town gal or farmer's daughter to me...but she obviously went to Toronto, got a degree in humanities at U of T, and began an illustrious career in Canadian television with the CBC. Fascinating. Canadians don't generally sound or look much like that anymore, but a lot of them did back then.

I suspect that "nippy cheese" is a reference to the stronger and nippier varieties of Cheddar...a cheese which can indeed be quite nippy. And it is the quintessentially Canadian cheese.