I had read that might be the case. I've only operated mine for about a day and so far it has had a slight greenish + pinkish tinge in low light situations. Mildly bothersome but not nearly enough for me to return it. I'm still seeing it, but it might just be a little less noticeable.
Apparently the capacitative layer is sprayed on. So maybe the hue is due to slight variation in thickness and associated prism-ing. Over time surface tension evens out the thickness and it goes away. How's that sound as an 'explanation'?