I'm reading Madeleine Albright's memoirs right now ("Madame Secretary") and just read an interesting tidbit the other day.
Essentially she said that she noticed a shift- when she was younger and went over to another couple's home for dinner or whatever, the children would be introduced and then they'd run off somewhere else. Later she found that in similar social situations the kids would be the center of attention all evening. This clearly was an unwelcome change.
Now, I remember when my parents would entertain when I was a kid, we'd come in, say hi, and then take off and play till bedtime (yes, we went to bed when there were still guests in the house- probably unheard of now).
I just thought it was interesting that she mentioned it.