Sorry, but I think it's you who should do the homework. Apple has not, since the first iPhone, said what glass manufacturer they have been using. "Gorilla Glass" is a trademark for Corning's aluminosilicate glass, not a company as you stated, and there are other companies who make aluminosilicate glass as well as other types of toughened glass. Apple could be using any of them or indeed more than one, Corning among them. Again, we do not know who has made any of the glass since the first iPhone.
Your comments are pure speculation. And just FYI, given how much misinformation Carphone Warehouse gives out, I wouldn't take anything they tell you as automatically true and certainly wouldn't quote them as any sort of verification of any point you are attempting to make.
Further discussion is useless, so there is no need to post back. If you broke your iPhone, you will need to pay to replace it, regardless of your rather misinformed opinion as to the overall ruggedness.