Tilting screen affects shutter shock!

Today there is a new thread about a photo shot using E-P5 and possible shutter shock. The thread degenerated quickly in a discussion about "SS exist / doesn't exist / exists only for few". SS exists for me and my E-P5, but luckily is no more a problem thanks to 0s-antishock. So I wrote a post for showing the test images I made in May 2014 for testing 0s-AS.

The discussion is also about repeatability and SS on tripod. Indeed SS looks like a random effect when hand holding the camera. I had an idea… SS is generated by the vibrations produced by shutter slap, which is specially hefty in an E-P5 because it has a 1/8000" shutter. The model of lens and the way camera is hold can affect these vibrations and that explains the different amount of shutter shock with handheld camera.
But there is a mechanical element that may as well contribute to vibrations: the tilting screen, which can be set in different positions.

So I tried right now. I disactivated 0s-AS and set release lag to "normal". Then took 3 photos. One with screen in, one with screen rotated 90º, and a third one with screen pulled out and rotated 45º. Then I set again 0s-AS and release lag to "short", which as expected produced sharp images in every screen position.

The results without 0s-AS are surprising: the first photo shows evident SS, the second one looks sharp (!!!) and third one with has worse SS.

The result with screen tilted 90º being so strikingly different, I took 2 additional sets of images. The result was confirmed.

Clean image with screen tilted 90º, visible SS with screen in (vertical), worst SS with screen pulled out. Sharp image using 0s-AS, no matter screen position. Here one set of photos, but I got the same in my 3 sets.

no 0s-AS, screen in

no 0s-AS, screen rotated 90º

no 0s-AS, screen pulled out and rotated 45º

using 0s-AS and short release lag, screen pulled out and rotated 45º