Ah - George. Hello.
I think most 13-year olds would already have had a clip round the ear in their childhood, no matter what class they were. The majority would have succumbed - meekly or resentfully - and a minority, of any class, would have been rebelling. In my own family, I have examples of each from the early 20thC, and class doesn't really explain the response, either at the time, or later.