just calibrated this screen with i1Display2 and as far as I can see, no problems with yellowish tint etc.
UPDATE: after running laptop my macbook for several hours I can tell blueish tint in the right bottom corner, it's like pretty much right side of screen is little bit bluish.
Will use laptop for the next month or so and next year will take it back to apple. I'm not paranoid, this is visible with naked eye. Not good for £2300 laptop.