I have it in a real well lit room and glare is not an issue unless direct sunlight hits it, which it can do a certain short periods of the day. Dont think you have much to worry about. Over all am real happy within the TV in the 6 months or so i have had it.
I purchased this TV in December this past year. Even though this TV has nonreflective glass, you will still get some sort of reflection with any direct light. The nonreflective glass does a decent job mitigating this. Much better than a normal glass panel would do. You shouldn't have any problem with natural light unless there is direct light coming in such as sunlight. The good thing is you can always make adjustments with the backlighting and the brightness controls. Hope this helps!
I have no glare problems, but I don't keep my main TV in a brightly lite area. I would imagine if I had a window staring right into the screen, that would be a problem for any TV. This TV is great ---buy it.