Well, if it's the same display as the first gen, then I'd say it's normal, depending on your brightness settings. Try tilting your device left and right whilst on a black screen like that and see it change. Personally, I'm not a big fan of backlit LED screens right now. My macbook SR 2007 screen was far more comfortable to look at than the early 2010 macbook pro I have right now, even after calibration. Lets face it, we all knew the ipad 2 was not getting a better display. Also, I blame Apple for this a lot as I have requested numerous times for the brightness control to go as low as iBooks as standard. I guess I've got sensitive eyes, but for night time use, it's just too damn bright for me.