There is NO SUCH THING as a 'Group A' aeroplane any more - and hasn't been for over 5 years. Unfortunately some unprofessional organisations still persist in using the term though.
Oh for crying out loud Beagle, will you stop. Nobody used the term group A, but yet again you choose to bang on about it for no good reason.
And to describe people or organisations who happen to use a particular shorthand term instead of this week's preferred jargon (I assume you refer to organisations like BMAA and PFA, where I know it's commonly used) to describe powered light aviation as "unprofessional" for that reason is petty and, put bluntly, incorrect.
If you want to call people like Francis Donaldson, Guy Gratton, Graham Newby or Chris Finnigan (all of whom I've heard use the term) unprofessional, do it to their face and justify yourself, don't make snide comments from behind a semi-anonymous identity on Pprune - you are bigger and more professional than that.
G