If you have a 2015 rMBP, we have the same model. There is no additional glass on top of the LCD, which every unibody model always had. One can argue LCD itself is made of glass substrate, but that's about it and that's not what Apple meant by glass screen on unibody macs.
Poke your screen lightly and poke screen of any other macbook. You'll see by distortion on the screen that you directly poked the LCD.