I just got Office Mac 2011 and when I open previously saved documents such as word documents or powerpoint slides, there's a delayed response almost like a stuttering (it takes like half a second to load) when scrolling through the documents. For example, when scrolling though a powerpoint slide, the previous slide will be blank for a split second and then show the words of the slide. Is this normal? Is it just due to the fact that Office Mac 2011 is pretty outdated and not optimized for the retina MBPs? System specs are 512gb ssd, 16gb ram and 2.9 i5 so I don't think it's the machine.