Are brunettes funnier than everyone else?

Here's a list of some of the Aussie comedians and tv personalities around:

- Andrew Denton
- Tony Martin

- Merrick & Rosso

- Hamish & Andy

- Rove

- Hughsey

- Adam Hill

- Will Anderson

- Judith Lucy

What do you notice? Most of them are brunettes. Is it because brunettes are funnier than everyone else?

(By the way, don't you think "tv personality" is a funny description?)