Both OpenGL and Metal are affected. The scene runs slower on the same target device.

Steps:
1. Build and Run Development build on iOS device ("CameraRender.zip") with Unity 5.4
2. Connect Profiler > check Camera.Render
3. Do same with Unity 5.6 or older and compare results

Results:
iPhone5: iOS10.1.1:
5.4.6f3: 5.3~6.6ms
5.6.6p4: 6.5~7.1ms
2017.1.p4: 6.7~7.2ms
2017.2.0f2: 6.4~7.6ms
--
iPod 6th gen iOS10.2.1:
5.4.6f3: 2.6-3.2ms
5.6.6p4: 3.0-3.6ms
2017.1.p4: 3.4~4.0ms
2017.2.0f2: 3.5~4.2ms