I'm not sure his test is statistically significant, but I can't blame him for not testing as thoroughly as I'd like, or even knowing to. :P If his is literally

I'm not sure his test is statistically significant, but I can't blame him for not testing as thoroughly as I'd like, or even knowing to. :P If his is literally invisible he's got it made. I can't see anyone wanting to have translucent images and shapes on their windows.