Of course I can only speak from personal experience. But in my experience, long personal e-mail (several paragraphs) from friends to catch up used to be relatively common, and now they've all but disappeared (I don't think I've gotten any in the past couple of years). Likewise, long chats of the old AIM/MSN variety - spend an hour or two chatting with a friend sharing ideas and news with them - seems much rarer than before (where it wasn't uncommon to have them every few days).
This is true for me too. It's funny that we can now literally connect to thousands of people in social media, but through likes and short comments. Sometimes I get the impression that long threads of discussion is not encouraged, that it's polite to just keep it short and sweet (example, when Instagram introduced the "like comment" button, I sometimes find myself using it rather than thanking directly.)
So our connecting is more like lines crossing over briefly, but never more than that. Sometimes this is fun - because where else can you encounter other people different from you - and sometimes it's just a little sad.
Where as we have F=m•a in physical reality, in hyperreality it seems as though the rule is inverted, F=m÷a.
It seems the less "mass" a message contains the more "force" it seems to exert. A long response is ignored and carries with it very little persuasive power compared to the pithy response of a mere binary form of approval.