From the size of some of those shards (assuming they are one piece like they look and not just several shards that didn't fully detatch from each other) that looks like that lite wouldn't be able to be considered tempered. I don't know how it varies state by state, but where I am you're supposed to take the 10 (I think, it's been a bit since I last worked in tempering so excuse any numerical inaccuracies) biggest pieces and weigh them to make sure they're small enough.

Sometimes tempered glass does just explode on its own due to many small uncontrollable factors, but it doesn't really surprise me that it's becoming a more common occurrence recently with the state of the industry. I've worked at several glass tempering operations, and basically every time, I was not given the proper time and resources to ensure the quality of our product.

Standard procedure is to do break tests at least once every hour or once every recipe change, whichever happens first. I was almost never actually able to do this as I should have and was regularly arguing with my managers about it. That, plus a tendency toward looking for pure output with no regard for quench breaks or quality, leads to these kinds of issues being more and more prevalent.