You sir are a moron.
Storm crowd was good, but by the looks of things the weather kept a lot of the $1 ticket holders away. Otherwise, an excellent year for the Storm, who have increased their average attendence by rougly 3000 despite all the controvercy and the spoon.
Crowds have been good this year, and to your 15-20k comment, have a look at the average attendences. Broncos, Bulldogs, Tigers, Titans, Rabbitohs, Eels, Dragons, Roosters all got averages >15k, and the Knights (with stadium issues) and the Storm fell just short. Both these teams will pull more than 15k next year easily.
Cowboys crowds are fair given the season they had. Manly are operating at a small home capacity of around 16k, so their average is fairly respectable in that light. The Warriors had a lot of bad weather games this year and are excuseable because their in another country.
The problem teams crowd-wise are Canberra, Cronulla and Penrith. These 3 have been for a long time.
Canberra has 350k people, but its not really a RL friendly demographic - its the city with the lowest average age, the highest average education, and highest movement rate of people. Its a city with young educated people drawn to government jobs from all over Australia. So you would say a lot of them would be from southern states, and the rest probably aren't that keen on football to start with.
AFL and soccer would really struggle to draw more than a 14k average in this city too. Look at the Brumbies, not much better. That and Bruce Stadium on a cold July night is horrible. I don't think the Raiders/NRL do enough to promote and support the club though.
Cronulla, well they are playing terrible football, and they have no money. Its an area where there are quite a few young families with loyalties to other clubs, so despite 300k in the Shire, the actual market for the Sharks is much smaller, don't forget there is the trendy beach shire crowd too, who probably don't care about football. They are sandwiched in between the Dragons which doesn't help.
Penrith is a bit similar to the Sharks in that there are a lot of people with loyalties to other clubs in the area, but they really should be doing a lot better. They use the "people don't support us" argument, but they have been around for 40 years, have a good stadium, a couple of premierships and a very profitable leagues club. They should be kicking @rse with crowds.