"At least 70% of the people who have sought information in each category say they usually find what they are seeking. The greatest successes are in news and shopping; government ranks the lowest."
Hmmm, I've actually been finding government sites to be getting much better, offering much more in the way of information and services than before, especially considering the normal lags between government and anything new. (Qualify: Not all govt sites, some are still truly poor.)
Might it be that many govt sites aren't spider friendly so might not appear in SERPs?