Same here, I have a 65 plate 184FR manual and V5C states CUNA under engine details.
I took delivery last Friday and I think the story broke around the same time. If mine is affected then it probably doesn't make that much difference overall in the real world however if it is affected then I will go full on crazy at Seat/VAG and point blank refuse any retrograde works.
I purchased a brand new car based on the info available, if the car is no longer in line with those specs then I require compensation based on my purchase. Its the principle of the whole thing really, not so much the actual ramifications.
Have a physical look at the engine, it will put your mind at rest. The pics are in this thread of the two different types.