Do Banners always slow down an app when they appear? I have an iPad 2 and I've noticed every time I receive a Banner style notification (the temporary pop in bar at the top of the screen) inside of a game app the game visibly stutters for half a second.

Is this just how banners always affect performance? If I disable banners for an app will that eliminate the speed hiccup or is this a problem with the behind-the-scenes notifications too?
This is the current state of iOS. You'll notice that incoming calls and pop ups (the old style notification) also negatively affect the performance of current app.