Thank you Sean. That gets me back to most of the 10.0 behavior I wanted.
At first glance I had missed the difference between the two "Stretch Proportionally" options ("vertex" [on the General tab] vs "topology element" [on the Topology tab]). I also assumed at first that the "Stretch Proportionally" button on the Edit Vertices toolbar would do what I want, but, again, it was for vertices not topology elements.
I see, however, you can no longer move more than one node at a time. I'll grant I rarely used that particular feature, but I'm curious as to the reason for removing it.