Not much evidence of this for flight to LUX departing from Gate 7 at T3 this afternoon- there were 2 separate queues (one for anyone bronze and up, other for non) where passes and passports were checked in order to enter the general boarding gate pen.
For boarding, wheelchairs and families with children called first. Then a call for priority boarders (Club Europe and anyone above blue I think) with no checks whatsoever- a walk straight through to the inevitable line of chairs and buggies on the jetty meaning any group could have boarded at will.
No tensa barriers, signs or mentions of specific group numbers in the boarding calls