Well, I am not very well informed on this topic, however, I tend to believe that the math checks out in the "correct horse" principle. This is a vast oversimplification, but basically longer passwords are better - the brute force complexity of additional length is in the exponent, the character diversity (special chars/numbers/upper+lower case) is in the base. Therefore, make your passwords as long (and randomly chosen - i.e. selection method should not be easy to guess!) as you possibly can.

Cool thanks for the link! Were you meaning to say that you consider the "correct horse" password selection principles bad advice? Or that the advice given by the author of the article is bad advice?