Not looking to “prove” anything. Just a pic to see this horrible yellowish tint claimed.
Most people can gauge a color shift between yellow/white with a mobile device. Most.
Just be mindful of what you do see. As a photographer / illustrator I could easily alter the image to give an unfair result.
Some of the yellow could also be a shift to a D65 colour profile which has a tendency to look yellow / green to begin with but is actually the best profile for view correct colour balanced images. We all become used to the blue tint of an uncalibrated screen and it is a bit of a shock when changing to one that is calibrated. Doesn't take long to adjust.
That said, I'd have to see one in person to make a call. Might pop in to the Apple store to have a look. I had the option to pickup a Silver 64g and a 256 Space tray (pre-ordered) but decided to stick with the 8+ for now.... cancelled them off so others could get their hands on them