3) That is just meaningless anecdote. Conversly, I'm seeing as many (possibly more) shattered S3 and S4 devices as iPhones. I've owned a 3Gs, a 4s and a 5 and not had to replace the glass ever.

4) So if there is a market for keyboards, it would suggest that there is a problem with the default one! I totally accept the point that Android has the benefit of selecting which keyboard the use wishes to use, but to use a term you seem obsessed with, you are moving the goalposts.