Yes, this is very true. And perhaps is some thing people are now not giving him credit for since saying "Australia haven't faced any quality bowling attacks" is everyone's favorite thing to say. Hayden is the only person in test cricket history to have scored more than 1000 runs in a calender year for 3 years in a row (2001, 2002, and 2003). This is testiment to the fact that he has huge, huge appetite for runs.