The total crowd figures are very misleading (given that new teams have been added in recent years etc which add to the totals). Average attendance at games are the best indicator, and looking at the figures I dont see a significant shift for a long long time (maybe a thousand or two either way).
Not convinced by the 05 "sydney teams were doing well" argument either. One of the GF teams was from townsville, a smaller market.
Anyway I'll rest my arguement there, because I just dont see in the figures a significant crowd improvement over the last 15 years but other people do. It's all valid though.