The database at geocaching.com is now 5 years old or so, but I don't think this has anything to do with NGS, which makes its data freely available for the downloading. As is their right, Groundspeak, the company that runs the geocaching site, has chosen to pursue other activities (e.g. launching Waymarking) despite frequent requests from many users for an updated benchmark database. This is one reason why serious benchmarkers will fetch a more current datasheet from the NGS website before heading out the door.
-ArtMan-
Amen Brother!