One thing I noticed going through the list linked in the page is, many of these .gov pages host _both_ www and no-www versions, making them essentially two different websites with the same content. Example: http://abilityone.gov/ and http://www.abilityone.gov/ It looks like the clear guidelines around this is something missing. I know of certain countries whose .gov domains are almost 99% www and they don’t serve no-www at all.