Trust me, by the laws of hardness; it would be impossible for a grain of rice to scratch Gorilla Glass. You could kick a grain of rice's butt with a piece of GG, however.
I think he meant that the rice does wonders but can't fix LCD damage...not that rice causes LCD damage.
I doubt it. Becuase rice doesn't do ANYTHING for any problem other than water damage. Actually, the usefulness of rice is a hotly debated subject; IMHO it does nothing. You'd be better off throwing it in a container with a couple of those moisture repellent cartridges from vitamin bottles (silica gel I believe) - rice doesn't readily absorb moisture until it is heated and some of the starch is converted to sugar.
I don't think we're on the same wavelength. I still maintain that he wasn't talking about rice scratching gorilla glass.