I've had the iMac Retina 5k for around 3 days now, so I have a very limited perspective on it's performance compared to other computers I've had for years; however, this is something I would like to hear from you guys... Is anyone noticing lag with scaled resolution? For context, I got 4.0ghz Intel i7 M295X (4 Gb) 512 SSD 16gb RAM From my quick personal tests, I've seen some performance slowing when using the 3200x1800 scaled option in programs like Photoshop CS6 and Adobe Premiere CS6. Playback of simple 1080p clips in premiere is noticeably slower when using scaled 3200x1800 resolution compared to the "Best for Display" 2560x1440 resolution. Does anyone have any other experience with anything of this sort? I know there is a lot of pressure for the M295X to perform, and while I trust in it, I feel cautious. What do you guys who own the riMac see?