A Facebook friend of mine posted an update that is so revelatory of this shift. With her permission, I use it here:
Here is an example of digital social networking restructuring our expressions of emotion... Profound!
"The gentle reader will never, never know what a consummate ass he can become until he goes abroad. I speak now, of course, in the supposition that the gentle reader has not been abroad, and therefore is not already a consummate ass. If the case be otherwise, I beg his pardon and extend to him the cordial hand of fellowship and call him brother." - Mark Twain, Innocents Abroad