My understanding from the time that this was first used in Alexandria, LA, AM was going through a period where he really wanted to emphasize the "Pentecostal" aspects of worship for his church. I remember he once said something like, "When things are on fire there's no place more on fire than our church in Alexandria... but when things are dead, there's no place that's more dead than our church in Alexandria..."
Of course, just about any pastor could probably say the same thing of his church, wherever it might be. But AM just wanted to stir his church up. Apparently it worked and folks in other places have followed the same approach with varying degrees of success.
I don't know that it's motivated by "arrogance," though acharris has a point about the way it sounds. It's just sloganeering. When done right, it good. When copied ad nauseum it does start to wear on you.
Yes, I tend to agree with this... it's not arrogance. acharris, would you honestly feel it was arrogant if one of you churches had done it? Assemblies of God could sound arrogant too (as though no one else was an assembly of God, but we know it isn't meant to be arrogant at all.
__________________ Mrs. LPW
Psalm 19:14
Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.