Quality of iPad 2 glass?

I fell asleep whilst reading kindle on my iPad 2, and woke to find my iPad had fallen off the bed and had cracked from one corner of the screen spreading through the screen. I have had it for less than 2 months and I am extremely disappointed in the quality of apple.I look after my things and even have a protective case, and the height of the fall was not high. Is this the quality of apple? Is the screen not supposed to have some gorilla glass? I find it pointless to design something so light and multi functional but have such poor sustainability. If I read a hardcover book in bed and it fell, it wouldn't brake.

My retailer says they have to charge me to fix it due to negligence.no 1 I don't feel I was being negligent and secondly the repair costs are outrageous. Everything else is working normally though... Just a broken screen.