Hello! First time posting but thought I would share and get some insight into something I found. Got a new rMBP 2.3/16 running 10.7 and was playing around with the iTunes visualizer. I also have gfxcardstatus installed. One particular visualizer (apologies for lack of pictures) that involved what could only be best described as strands of DNA flying out appears to run much smoother on the integrated GPU compared to the dedicated GPU. In fact, when I switched to dGPU, the visualizer dramatically drops its framerate to a stuttering speed. Is there a reason the iGPU outperforms the dGPU in this setting? Thanks in advance!