Notifications Quack-religious leader? does it mean "both an unqualified doctor and a religious leade

I consider it a clumsy and rather ugly mistake.

and that it is still (OED 2012).

There is little that irks British defenders of the English language more than Americanisms, which they see creeping insidiously into newspaper columns and everyday conversation. But bit by bit British English is invading America too.

"Spot on - it's just ludicrous!" snaps Geoffrey Nunberg, a linguist at the University of California at Berkeley.

"You are just impersonating an Englishman when you say spot on."

"Will do - I hear that from Americans. That should be put into quarantine," he adds.

And don't get him started on the chattering classes - its overtones of a distinctly British class system make him quiver.

But not everyone shares his revulsion at the drip, drip, drip of Britishisms - to use an American term - crossing the Atlantic.

& etc

Thank you. That entry could have been more tightly written, imho. As I noted earlier, some textbooks are a bit unsatisfactory at times.
But still mainly and firmly in the medical field, you will agree.

It is? I have consulted mine, admittedly not 2012, and you get to meaning #4 before you even get as far away from medical practice as "charlatan". And that's not very far.

Britishisms and the Britishisation of American English
By Cordelia Hebblethwaite,

Cordelia Hebblethwaite, I daresay that's one bloody fine example right there. Smile

You might as well say that it is "wrong" to employ phrases like media whore, attention junkie, grammar nazi, grammar police, etc.

it has long ago been expanded to include other meanings.

but I think the available evidence does not bear out your and contrex' contention.