US Government IPv6 Deadline

The US Government previously imposed a deadline that by 30 Sept 2012, all Federal agencies must have their public-facing servers running on IPv6.  The deadline has passed already.  Less than 30 % of Federal websites are operating with IPv6.  The situation of mail and DNS servers are even worse. This is the statistics provided by NIST one week ago.

A question remains.  How to push these Federal agencies to quickly deploy IPv6?