The fracture pattern depends on the direction of impact. It's easily verifiable under a microscope. From the thread it sounds like Apple did indeed verify them with a microscope. However people are not always rational, especially when money is involved.
If you go through and read a few it becomes plain that there's a few themes emerging. Clean everything, lid closure.
I find it a bit laughable that they can "verify it under a microscope". The glass is present under tension, and a weak point releasing that tension could very well cause local divoting at the origin of the crack as the pressure is released towards that point and microsharding occurs.
I don't think that means much. There were 1500 complaints about the original 12" Macbook's butterfly keyboard in the OG thread[1]. That keyboard went on to be recalled.
...were? I just clicked it, both out of curiosity and spite (I had one of those damn keyboards), now there are more.
Your counterexample means even less, since my numbers are based on measuring something useful.
Besides which: what kind of case do you think you're making by pointing out that actual design/manufacture problems with Apple products show up in Apple forums?