Not that it's relevant to the thread but I call them a variety of things as the mood takes me and don't get too hung up about titles and stuff like that.
FWIW, I seem to recall that in the UK the CAA took to calling them air traffic controller about 10 years ago - maybe something to do with the role no longer being equivalent to a civil service officer grade in NATS. And then the EU came along with some rules which were referred to as the ATCO Directive....
Does it really matter?
