Success or failure seems to be in the eye of the beholder. Just as a girl can seem beautiful to some and unattractive to others. If your standards were for STID to set all kinds of records and compete with many of the heavy hitting big budget blockbusters then it was a dissapointment. If you simply wanted STID to be commercially viable and make a profit to justify a sequel then the results were extremely satisfying.
I mean hey, you can argue whether the grass is green or every color but green . . . it only affects your perception of the object. It doesn't change the actual grass.