Behaviour change lag

Okay, so who's been looking at these pictures and thought something along the lines of,
"Oh yeh, just wait till the first real test. Then we'll see if they can get on so well. . . "

And isn't this so often our reaction when a child manages to change their ways. Many sceptics just sit back and wait for 'The real Johnny' to re-emerge, and then smugly tell you, "See. Told you it wouldn't last!"

Seems getting on is the new falling out.  Where will all this end up I wonder?