Nonsense. Marco may be frivolous and scatter-brained but the man has some serious brain power. He's a very effective duck tape programmer and does some hard algorithm work along with serious UI polishing. There aren't many millionaire independent programmers who succeed based on the quality of their programming without much business and marketing acumen, but Marco shows it can be done.
I never questioned intelligence levels of any of the hosts. It's just that John is infinitely more entertaining, informative and insightful; Marco and Casey are often out of their depths on many subjects.
I like to listen to Marco's point of view of the tech world, being a successful independent developer his (conservative) opinions on languages and platforms are always insightful.
Casey is a fine straight man.