Either Burger King or Harvey's (a Canadian chain), with KFC in third place.
I am dismayed (only a little bit, though) to see McDonald's in the lead. The only menu item I will eat from there is their Egg McMuffin or one of its variants (Sausage and Egg, Bacon and Egg). And since Tim Horton's (a Canadian donut shop chain) introduced its Breakfast Sandwiches (egg, cheese, and either bacon or sausage, on a "homestyle biscuit"), I haven't gone near McD's even for the McMuffins...
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"Some mornings it's just not worth chewing through the leather straps." -- Emo Philips