Does anyone really use their iPad at 100% brightness in a dark room? Talk about eye fatigue. Obviously there are some defective panels out there, and mine has bleed in the above conditions (power on iPad with brightness at 100% in a completely dark room). But at 50% the same test is not near as dramatic, and that's the general level I keep it at anyway.
Also I take these pictures with a grain of salt since the bleed can look more (or less) dramatic based on the quality of the camera exposure.
The thing is, there are levels.
There is a arguable area between, that's as good as you can expect for what is is, and, that's pretty bad it needs changing.
Different people will have different opinions.
We are already giving Apple some slack here, saying we will accept screens that are not 100% perfect, the question is how bad.
As was said, all screens, suffer to some extent, some really bad, some barely noticeable. It's a pot luck / lottery.
To be honest, this should be the type of event you would expect on a low end cheap model from China, it's low price, so it's pot luck. It should not really be pot luck basically buying the highest end product you can.
The best they should do is tighten quality control to catch the really bad screens, or perhaps it's actually cheaper for them to use the public as quality control, just ship them all, and either they are accepted of they get returned.