There are some things about human contact that have lasted the ages. One of them is the need to directly communicate with each-other. Expecting your friends to visit a website on a regular basis if they want communication from you is inconsiderate, and that transcends generational boundaries. Sure it works with "friends" (who used to be known as acquaintances) but if you're trying to tell me the new generation doesn't actually have friends close enough for direct communication I'll call you disconnected from society at large.
Whether it's "I'll tell the innkeeper if I need you, no need to darken my doorstep" as in days past or "Don't call me, I'll call you" as in pretentious modern Hollywood or "If you want news check my Facebook status" as in your intent, it's not some new wave, it's being too selfish to give the other person a moment's time.