Well that's not fair having this show at lunch time.
I was at Burger King last Friday and had 2 'regular' sized cheeseburgers. I thought to myself "when did they start serving silver-dollar burgers in this place?" It also taste a bit more rubbery than usual.
Usually my feelings are McDonald's has better fries, Burger King has better burgers. BK also doesn't put onions on their regular burgers, which means I don't have to ask for no onions and hope they do it right, so I guess BK get's my vote.
Taco Bell is just wrong though. I mean, seriously.
Edit for more thoughts:
Does pizza delivery count as fast food? If so then Domino's or Papa John's wins by significant "numbers".
Also, I will give Taco Bell credit by being probably the most aware of exactly what it is. Most of the time anyway,