yes to both, imho. Neither are 'news worthy' if the link it's too is news worthy then that link should be posted not the link to the twitter.
I come here for new and articles on running a business, technology, and to help others.
clicking through to a 1 sentence twitter from my rss readers is not a good use of my time.
I can see the place for something like twitter but I don't think that place is something like hacker news.