2.3 ghz 13" 2011 model. I noticed when I hit full screen on not even a HD Netflix movie it will be very choppy. I didn't expect that from a MacBook Pro. I haven't tried anything else but Instant Streaming Law and Order. I know it's not just that though because when I stream Law and Order to my Xbox it is fine... Thank you, I have already searched and found no results for my specific problem! Edit: It is only on Full Screen mode when it gets choppy.