I am going to play devils advocate and call shenanigans on your story. I will point a few details as to why I think it's bogus.
1 - Your start of your post with "At Starbucks today with a colleague,
working on our new MacBooks." - what does that have to do with anything?
2 - I have been to over 50 Starbucks in my life. Not one of them has ever had carpet. Ever. For a place that serves beverages and food that are prone to spilling, dropping and the like, carpet is the LAST thing you want for a floor. They are always wood/tile.
3 - "sickening sound of aluminum and glass breaking" - Aluminum doesn't "break". unless a decent amount of force is applied. That wouldn't come from a drop.
The IPP is not easy to break and is pretty sturdy. The larger glass surfaces allows it to absorb impact much better since it flexes a bit more. Watch the videos below that pretty much show the exact OPPOSITE of what you're saying here.