Yes and that's complete nonsense, pure marketing talk. The pressure from a drop on a corner or the back of the device will NEVER be stopped by a screen protector. That's physically impossible. But just that is exactly the biggest risk to a 1520. Sure if you drop it on a screen you have a microscopically better chance of having it survive, but because the screen protectors are extremely thin still, they won't help anything for most impacts powerful enough to break a screen.
Glass protectors are a nice story, but they don't do much extra over a normal screen. They are also a little too thin to protect from a good fall on it's screen. It's not the direct impact that cracks a screen on a Lumia but the pressure coming from corners that a screen can't handle.
They are great for scratch resistance, they do scratch easier than Gorilla glass, but at least you can replace them. They are made of the same cheap material iphone screens are made of, and we all know how unbelievably fragile that relatively thick tempered glass turns out to be in real life.