And what exactly is wrong with the room? The other cameras tested were subjected to the same environmental variables, yet they didn't exhibit similar, or any, focus inconsistency for the matter.
* He put the target in front of a window. If the AF point of any camera is not precisely aligned it can jump between target / window / background. First major sign that whatever his skills as a photographer, he lacks the knowledge and attention to detail to setup and perform valid, repeatable tests.
* It was pretty obvious that the camera distances / positions were not precisely maintained between tests.
* He made no effort to ascertain if the M's failure to acquire focus was due to human error, camera malfunction, or was an accurate discovery of a weakness. He just rolls his eyes and whines "IIITTTT'SSS CR@@@PPP!!!"
* He did not test equivalent lenses on the bodies. Pancake lenses are typically slower to focus on any system. He tested pancake against zooms. If I test a Canon 300mm f/4L IS USM against an old Nikon 300mm that relies on the body AF motor, is it a reflection of the body AF subsystem speed or the lens?
He acted and tested like a child. I'm not hostile towards him. I'm just calling it as I see it.