I have noticed that window resizing is a bit laggy on this machine, especially in apps like iTunes. I wonder if that has to do with the decision to use Intel's

I have noticed that window resizing is a bit laggy on this machine, especially in apps like iTunes. I wonder if that has to do with the decision to use Intel's HD graphics instead of the Iris Pro on the 15. The Radeon probably isn't going to get activated every time I need to resize a window with a few graphics on it. Also, I hope Apple fixes the palm rejection on the giant trackpad soon. I wind up accidentally activating Siri quite a lot. Otherwise, good machine.