The AFL crowd average is basically double the NRL average, and has been for 60 years (as far back as the crowd records for league I was consulting go). West Coast, Fremantle, and Adelaide all have a higher average attendance than the donkeys, in smaller cities and competing with cross town rivals. Fremantle are having a good season, but the other two teams have been as shit as the donkeys, when both were expected to feature in the finals.
With the obvious exception of GWS, AFL fans have a culture of going to games in numbers, and always have done. Heck, even the Suns, a plastic franchise in hostile territory, have a better home average than Canberra, Cronulla, Manly, the Cowboys, Parramatta, Saints, and the Tigers (the Tits are marginally ahead of them). That is frankly embarrassing.