There are many examples of how the glass on the Samsung Galaxy S3 is defective in forums, YouTube, and other online sources. Some with it breaking without impact. Other where it takes almost nothing to crack the screen. The responses from Samsung and the Cell Phone Carriers is that "ANY" glass issue is customer abuse. They need to investigate without their prejudicial bias, and possibly recall the phones that have the defective glass.
From Corning's Web Site:
"Visually stunning, incredibly tough Corning® Gorilla® Glass enables today’s sleekest smartphone and tablet designs, while providing exceptional damage resistance to the drops, bumps, and scrapes of everyday use. Gorilla Glass is sensitive enough for today’s most sophisticated touch applications, and is available with an easy-to-clean coating.
Featured Samsung GALAXY SIII
Showing an image of Samsung GALAXY SIII"
From Samsung's website:
"The expansive display is protected by Gorilla Glass 2.0 to guard against cracks and scratches and provide enhanced touchscreen responsiveness."
This is from their announcement of the S3. Samsung has removed all reference to Gorilla Glass in their current S3 description.