So I bought this shiny new late 2013 15" 2.6 rMBP yesterday. I was suprised to see how Gmail felt sluggish (compared to my 2012 MBA). I booted Quartz Debug, and here's the (surprising?) results: Scrolling in Gmail on 2012 13" 1.8 MBA: ~60 fps Scrolling in Gmail on 2013 15" 2.6 rMBP: ~25 fps Am I the only one around here thinking that the integrated graphics on the rMBP is way underpowered to drive the retina resolutions? Don't get me wrong, I really love the high DPI of that panel. But I don't think that high density polish should come with a framerate cost. I have become accustomed to the responsiveness an fluidity of my old MBA. I was at least expecting the same UI performance from a $3k-ish pro-grade laptop. I really dig the overall performance of this machine: the SSD is blazing, the quad core chip plows through everything and the IPS panel is beautiful. The underpowered graphics chip is the ONLY flaw I have found so far with this laptop, but it's a deal breaker. Maybe the Retina resolutions have arrived too early, and the industry should wait for the integrated graphics to be powerful enough to drive those panels at a consistent 60 fps, what do you think?