btw, is there really such a yellow screen fix? where you leave the display on for hours with maximum brightness to moderately heat up the screen and from time to time it will gradually reduce yellow tint?
Well I read that too.. but I am inclined to believe it would make no difference, certainly not in short term anyway. There will be slight minor change perhaps over a long period of time as the rear illumination ages, but it would be a really small change I suspect.
The last pic comparing your iPad to your phone does not look too bad to me, infact if anything, to my eyes your phone screen looks to have too much blue hue.
I returned my 1st iPad 3 a few days after receiving in March when they were first released, purely because it had one solitary dead pixel in the centre about 2 thirds down the screen. It took me 2 days before I spotted it, but once you know it's there and of course know where to then look, you seem to be looking for it all the time afterwards, plus I think it's because you know your beloved new iPad is not perfect, so it plays on your mind a wee bit...lol
Personally, I would say one would struggle to find any man made device thats absolutely 100% perfect, however for the kind of money we are paying for these devices we expect it to be pretty near perfect. Things like very minor light bleed at the side which are only visible in a dark room I just don't worry about, but if it's something that is noticable under normal viewing conditions then it obviously should be replaced.
The problem... like you are experiencing at the moment is trying to decide whether it warrants return and thats the difficult part, AIS it looks okay to me, but a small screen picture is awkward to tell if there is a issue that warrants it's replacement.
The fact you have noticed it yourself may be sufficient reason to pop it along to an Apple store (if possible) and compare with another, or for peace of mind simply return for another, though sometimes the replacement might have some issue of some sort...lol had that happen myself in the past. Only you can decide.