Didn't he dogs have the highest selling jersey as well as having the higest crowd average? Look at he higest crowds in Sydney this year. the Dogs feature in he majority of them. Bris first but definitely dogs second. I'd say tigs third then probably parra then dragons.
It has to be put in perspective just a little. Parra play all their home games at parra stadium, bar 2 of them, souths and dogs.
Of the other games, parra sold out twice IIRC. Now when ticket sales are high, and near sell out, you dont get many of the 'blow in' crowds, that decide to rock up to parra stadium last minute. Now this problem wont happen at the dogs home games, because there will always be seating available for the fans that decide to turn up last minute.
Tigers also take 4 home games to the SFS, which allows them to inflate their crowds a little to.
Im sure if the eels had a stadium that could accommodate 30000 people, then their crowd figures would of been above that of the tigers and the dogs.