I'm using a 4S so maybe that is my issue although it shouldn't be. I'm not talking about the 2 animations you sometimes have to go through. The regular zoom in animation and then a unnecessary but brief diffuse animation for your favorite contacts to appear. I'm talking about the lag when you touch any of the buttons on the bottom. If you have used the app recently then the lag isn't there. If you haven't made a call in awhile, it's pretty noticeable when navigating around the app.