Try going to dreamforce.com and scroll. Does it lag bad? Its horrible on mine. My friend just got the same 13" late 2013 rmbp as me and has been complaining about horrible lag. He does not read the forums at all and but does a lot of research for school and has been complaining about it. I didn't believe him or others on here at first until he had me try this site. I tried it with both safari and chrome and it is a mess. Perfect on the iPad and iPhone. I really hope Apple can fix this. Very disappointed.