This makes sense -- next time you're at a bus stop (or riding public transit), take a look around -- I guarantee that more than 50% are looking at their phones.  This doesn't mean that Millennials or "kids these days" are bad or lazy or self-absorbed.  Rather, it means that smartphone manufacturers and app developers have tapped into two previously-unknown parts of the human condition:  a) the overwhelming urge to avoid the discomfort of "waiting", and b) the desire to be left alone in public.