I think it is entirely overrated. I love blonde jokes...but they are just that; jokes. Do I believe that blondes are all truly stupid/ditzy? Not at all. That's like trying to say that brunettes are always shy...it's not true at all. You cannot classify people like that. Do I feel that all blondes are smart? No. I don't agree with all these girl dying their hair blonde to 'suit their ditzy personalities' either. What started as a joke or two has now become a common belief.