There are various color profiles that people have posted that can help get rid of that or you can calibrate the display yourself. If you adjust it correctly, it should barely noticeable at all or not even there.
Anyway I think all the screens on delivery have this yellow from an extreme angle. Mine definately has it (Quick swivel on my lap and there it is). Definately not a problem and nothing to worry about.
Many people are saying that calibrating the screen helps remove this. System Prefs and away you go. I tried but I wasnt clever enought to get past the first step! Although I bet its really easy to do!!! Silly Silly Me