Well, Storm fans would be thrashing their gear at the moment, while Broncos fans wouldnt.
Also. Their has always been alot of non-Victorian Storm fans. Usually because they just go for the team that one a Grand Final or because their team got kicked out of the comp and the new boys are the best bet.
I know in 1999 at the NRL GF a lot of people went for Melbourne over St George because they can't stand the Dragon and their fans raving on all the time about how great their club is. I even remember a final between Melbourne & Brisbane in Sydney (gotta love the NRL's vision for developing the game
) & everyone cheered for the Storm. Even Andrew Voss the caller got a chuckle out of that, New South Welshmen cheering on "Tards".
There are a lot of expat Vics living in Queensland. Maybe they have gotten behind the Storm to keep some link with home? (Then again, they'd more than likely be wearing Richmond Essendon & Pies stuff etc etc, as in Melbourne RL is seen as decidedly 'alien'.)