In Xcode 7.1 Simulator, when using ⌘+s to save screenshot to desktop, it saves the actual size of the simulator. For example, iPhone 6 Plus 100% sc
To take a screenshot of the iOS, watchOS, or tvOS device and save it to your Mac Clipboard
choose Edit > Copy Screen.
choose File > Save Screen Shot.
A screenshot of each open simulated device is saved to the desktop of your Mac.