I've seen those numbers before and while I accept them, I don't think they're an entirely accurate reflection of the supporter bases that do show up for games or watch on television on a regular basis - a fair portion are bandwagon or loose affiliation, otherwise you'd already be seeing 20,000+ crowds at Storm home matches (which will happen in the not too distant future though). Same for the fact that Bulldogs out-average the Dragons and Eels as well.
I already made a post about this previously breaking the teams into 4 tiers:
http://forums.leagueunlimited.com/showthread.php?t=368668
You notice it does have some close parallels to the Roy Morgan poll but I'm more focused on the actualisation of the fringe support into firm support.
Dragons and Tigers are more than capable of selling out ANZ this Saturday. If they don't even come close, then its a blackmark on their supporter bases.