So, what exactly is your definition of fast food? Most likely, you're definition will have something along the lines of getting food fast. Well, if that's indeed the case, I think Taco Bell no longer qualifies as fast food. Let me explain.
This past Friday, my brother, his wife, and I went to Taco Bell to pick up fast food for Fast Food Friday (still awaiting a copyright for that). We get there, and order our food. I am not making this up when I say it took about 20 minutes for us to get our food. 20 minutes! We could've gone to a more "authentic" Mexican restaurant and gotten our order in less than that time. 20 minutes! Really? How can that even be justified?
Seriously, Taco Bell. If the reason you can't get my food to me quicker than in 20 minutes is because your prices are so low, then I suggest you add 10 cents to the price of everything and pick up the pace. I have always liked your food, from a fast food standpoint. But, I can't justify ever going back (this has happened more than once, by the way).