There must be something in it that says this dosnt apply to the Phoenix as their findings dont seem to be backed up by our attendances. So there has to be more to it than just winning.
I looked into it a little last year. Crouds start fairly strong (novelty factor after a long offseason?), drop a bit then are mostly steady until the final third of the season, where if the team is winning, crouds come.
Overall, Winning matters a lot. But it doesn't show up all year.