I agree. Up to a point, it seems to have a beneficial effect. Especially in design, perhaps not so much when it comes to data modeling and logic.
I've heard about that weed book before - do you actually own a copy yourself? Any good? Or the other book on that link you gave, about meditation and creativity?
Lurkio
Cannabis has been used for thousands of years as an aid to meditation in various Eastern cultures, e.g The Saddhu tradition in India.
Meditation has not only made me a better coder, but has really helped with my anxiety and depression.
I found this book most interesting:-
Also, to those here who beleive that it can't possibly help with creativity, try it, you will not be disappointed. I find it hard NOT to be creative on it, it's just that kind of drug. If you have too much or use it badly then obviously it's not going to help, but as long as you use it responsibly, it's a great drug for helping you get back on track on those days when thinking about coding is the last thing you want to do. It gives impetus, creativity, stamina, and in some cases, very strong objectivity about your output too.
Lurkio