Maybe you didn't read the same link? Arment did not mention that text in some apps looks worse on the rMBP than on a non-retina screen, which is true regardless of the chosen resolution on the rMBP and is a pretty big issue right now if you use one of those apps frequently -- stopped me dead in my tracks when I saw it at the Apple store. He was using the lower resolutions to avoid the lagginess problem. Eventually this will be sorted out -- although Microsoft's early signals and Mac track record indicate it might be a long wait. But it's relevant information that many potential buyers would want to know.