I love Tim Hortons as a Canadian institution... and the coffee tastes so good. But there is definitely something in there aside from coffee. There's more caffeine for one and it also tastes quite chocolatey.
I agree with fang_x about the small cafe's. I was a die hard Tims person until I heard news last year or year before that Tims was moving their corporate HQ BACK to Canada from the US. I totally thought it was a Canadian institution, this disappointed me greatly. So now my hard earned money goes and helps the guy at the end of my street pay his mortgage.
Used to drink 2 large coffees with cream per day, but cut back to one or two mediums per week and started taking a thermos from home.
There's a TH in my building at work so the temtation is always there.
I'm not a big fan on tim's coffee, my stomach doesnt agree with it, but like someone said earlier, the chocolat chip muffin is hard to beat.
I live just outside moncton, nb which is known to have the most tim's per capita (population). Timhorton.com count 26 for 126 000 people but it could be more than that. There is two street that has 4 tim's