I'd agree with him, but it was a pre-season game. The Eagles purposely were trying out something longer than they would in a real game, and that's why it felt like the flow of the offense was being stalled. During the regular season, I doubt they use it more than 3-5 time a game.
For McNabb's sake, I hope he doesn't go into a funk this year. Those fans in Philly will slaughter him.