Coming back through customs from AKL a couple of weeks ago, I was talking to the Customs guy manning the express lane and asked him if it really was all that quicker. His reply was that there is no difference really between express path and regular lines, it just keeps some fliers happy to think they have received a privilege befitting their sense of importance. I must admit, it didn't seem to make much difference in the speed I cleared customs. I wouldn't be too fussed in not getting an express card, particularly if I was only flying in Y.