Apple refused to replace my first one that had half a yellow screen, so I sent it back for a refund and bought another. Still awaiting delivery.
I find it hilarious the way Apple uses their "within spec" statement. They basically write their own laws to **** consumers over.
If I bought a £2000 TV off Amazon and half of the glass on the screen was tinted a different colour, its still "within spec". However, it would be in unsatisfactory condition, and Amazon would replace it. Apple on the other hand don't seem to care at all about what you get.
Heck, If I buy a bag of Doritos I can get them replaced if I find they were already opened slightly beforehand. Why Apple refuses a straight swap when there is a clear defect to the iPad screen, the centrepiece of the entire product, is beyond me.