BA recently changed the threshold for concord room card. Existing members were given couple months to reach the original threshold.

Someone could argue that they take all the flights and expected to become silver and enjoy the advertised benefit. (unlimited lounge access when flying CX), so I wouldn't be surprise that the 4 lounge access per year would only kick in at least 12 month later.

But I think you are more interested in the PPS style benefit...