There are, of course, exceptions to every rule.
But I simply do not believe that twelve year olds drinking at this level is common place - in fact I think it's more like bravado when these kids are answering these surveys to claim how much they are actually drinking.
And if I am in fact wrong, and twelve year olds up and down the country are consuming nineteen glasses of wine a week, then why are their parents not under investigation by Social Services, since a parent should surely know where their twelve year old is and what they are doing?