I want to repeat this to make sure I got it.
The value for you in Twitter is news. You try to stay away from people who might be excitable and/or trying to be entertaining, and follow folks who tend to give immediate little chunks of news.
Among MSM journalists, the word is that Twitter is just creating a huge echo chamber, where one person starts a rumor and then seasoned reporters and editors have to rewteet/comment on it or miss out. By staying away from certain folks, are you able to keep the BS/noise level down?