I sympathize with whoever criticized the guy for loud typing. Seriously, it's distracting/disruptive. I learnt to type on (manual) typewriter too but laptops and keys don't need to be stabbed with the force of a thousand suns to register the press. It can be just as loud as people talking and (IMHO) can be harder to tune out. After all, we're used to hearing people talk all the time. Oh and while I'm in the mood for…
I'd like to know how loudly you need to type to exceed the ambient noise on an Amtrak car, of all places.
People generally talk loud enough to happily hear each other over any background noise. They tend not to notice, either.
As such, when businesspeople consider the quiet car somewhere for meetings because everywhere else has noise, everyone in the car hears exactly what they are discussing.