Has anyone even noticed how great the active noise canceling is during a call on the iPhone 5? I feel like this is a very good feature that is completely overlooked! I was talking to someone on the phone today and 10 seconds into the call, my ears started to get the "underwater" feeling in them. I then remembered something in the keynote that talked about active noise cancellation and it actually works really well. It's a very weird feeling when it happens but it sure does cancel out a lot of noise, even if it is one ear. Anyone else notice this?