I was on holiday when this story broke. If you google it you'll find it's reported in several places.
I haven't seen any comments on it - very odd, as we have been bombarded for several years with the opposite message.
I'd be interested in any views. I notice that it seems to concern dementias in the elderly exclusively. Some people believe there has been a dramatic increase in the incidence of young onset dementias, though I have not seen firm evidence on this.