Storm are not in great form. They are defending well (except last week) and finding ways to win even when they are off.
They did enough to win vs poor Bulldogs and Warriors teams, without looking good (like us vs Eels and Knights), they were very poor against the Tigers, but the Tigers fell apart and they did enough (similar to us vs Dragons but Dragons didn't fall apart), they were OK but lucky vs an OK Broncos (like us minus the luck), and were excellent against highly rated Panthers (like us vs Canberra, though they were on all game, not just 60 minutes).
The main difference between us and the Storm is completions, which is keeping them more in games when they are off than us, and kick defense, since when teams can't get through them they are not conceding to kicks (or intercepts) like we are.
In general play, Storm have been poor to great, depending on the game, but good enough when it counts, and we have been poor to great, depending on the game, but not always good enough when it counts (same could be said of many teams).
The Storm deserve to be favourites next week and this year, because they tend to switch on enough to win more than other teams, but they are not exceptionally better than other good teams, when they are all playing at their best. The comp is wide open, and we are as good as anyone.