Clarification over iPhone 4 screen breakage data

So, the iPhone 4 suffers 82% more screen damage compared to the iPhone 3GS. But there's more to that data than initially meets the eye.

I was bothered by this wording in the report:

Of these iPhone 4 accidents, the vast majority involved a damaged screen. When we evaluated damaged screen reports, we found the iPhone 4 had 82% more broken screens than the iPhone 3gs reported in the first 4 months.

Does "screens" refer just to the front surface, or the glass on both the front and back of the iPhone 4? So I approached SquareTrade for clarification and here's what I got back:

For the report "screens" refers to the glass on both the front and back of the device.

 So, while the iPhone 4 has twice as much glass, breakages over the first 4 months is less than double compared to the iPhone 3GS. That's a good thing, and shows that the new GorillaGlass that Apple is using is more robust. This is a WIN for Apple.

But ... problem is, Apple has created a device with twice the vulnerable surface (and my guess the back is more vulnerable as people are less likely to put the phone down on the screen). This is a FAIL.

Swings and roundabouts ...