As someone who barely ever picks up a call or reads an SMS in less than an hour, and often a full day, people are annoyed at first but soon get used to it.
> if I don't respond to whatever internet/text message they sent with near immediacy- because it's always available
I have to agree with you on this one. But I believe it suffices to say that no, you're not looking at email/fb/whatsapp/whatever all the time (and acting like that)
Not quite- if I don't make it to the pub one night, people just brush it off and think "I'll talk to him next time."
People seem much more vitriolic if I don't respond to whatever internet/text message they sent with near immediacy- because it's always available.
It seems like there's a shut-off valve with the pub, or a land-line and answering machine- not so with facebook, texting, what have you.