On Mon, 09 Jul 2007 04:27:48 -0400, Bob Noel wrote:

However, users generally don't
have any objective quantitative measures for assessing which features are
more useful or for comparing different capability implementations.

Also, remember that "users" in a different context are "witnesses".
Considering how reliable these are should provide some hint as to why some
expertise is required to evaluation the collective of "opinions".

- Andrew