A lot of people express strong opinions about the value of twitter/identi.ca without having seriously used it. I did too! But of course it is usually a mistake to think that I know better than other people do about something that they are doing and I am not.
Because when I eventually gave in and tried it, I found that twitter/identi.ca provides great value to me, when used in the way that I use it.
One thing that I appreciate about our grumpy editor's journalistic practices is that he doesn't opine on a subject without having first-hand experience to report.
One tip our grumpy editor might consider is to rely more on the follow button, and on reading the streams of individual twitter accounts, and less on the search feature.
I've never used twitter to follow "breaking news" (about emergencies or exciting events in the worlds of celebrities or politics, for example), but for the uses that I put twitter to, searching mostly turns up noise (to my ears).