A couple of weeks ago I was talking to a professional photographer who shoots all our company functions. He has a D800. He spoke about the green cast on the camera display on the back, and displayed a picture that he had just shot indoors under fluorescent lighting. The picture had a slightly greenish hue.
I cannot speak to whether he had his white balance set properly - I didn't quizz him on that. But there was a definite slight greenish cast to the picture.