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on the flights, a quick look at Qantas:
Syd -> Ade $165
Syd -> Per $288
on the actual question, probably media hacks in Sydney working for the Daily Telegraph. I didn't see what the crowd figure the Sharks game in Adelaide was on the weekend. I guess the fact that Cronulla hve played a "home game" in Adelaide since at least 2005 is eveidence enough