I also took an upper division economics class at Berkeley and that took far more than an hour of studying. Even at community college I studied my econ classes for more than an hour per week. Unless you have a photographic memory I'm not sure how you can avoid it and still get good grades. Please explain your technique.
Studying is studying. It doesn't matter if it's assigned studying or not.
Also, a bunch of the project-oriented classes simply assign enough work that you don't need to study much beyond it. If you're spending something like 10 hours a week on programming projects, you tend to pick the material up fairly quickly.
So I guess it depends on how you define studying: if you include doing assignments and reading then I do a fair bit. If you only include anything beyond that (e.g. reviewing lecture notes or something like that) I do relatively little, and only before harder exams.
I usually assume that studying refers to anything not directly assigned, which is why you can get away without too much of it assuming you go to lecture and discussion and that you do all the assigned work.