Everyone always cries about the factory calibration report in the box being printed rubbish. Look, back when we worked on heavy Trinitron monitors you had to warm the tube up for forty minutes and adjust purity rings by hand. If the vendor puts a sheet saying delta E under two, they probably hit that on one cherry picked unit in a dark basement measuring dead center for five seconds. Technically they did not lie on paper. If people expect a three hundred dollar screen to behave like a five grand reference monitor in broad daylight thats on them. Get an old puck and calibrate it yourself or live with the greenish tint.