Just my two cents on this interesting topic. Personally, I believe the degree to which humans loose hearing as they age varies and under normal conditions is small. Obviously if there is anything medically wrong or an unusual accident this is a different story. In any case, the point about a "reviewers" abilities are nevertheless called into question. I would point out this is why people should opt to hear/read from a relatively large number of reviewers. Theoretically all should be similar, but practically there may and likely will be differences and it is at that point that you need to further investigate (listen yourself, check technical specs, etc.).