Yes, I upvote links that I would like to see the community talk about, even if I haven't yet read the article, and in rare cases if I don't even plan on reading

Yes, I upvote links that I would like to see the community talk about, even if I haven't yet read the article, and in rare cases if I don't even plan on reading it. Of course this differs case-by-case, but I use my vote to stimulate conversation. Like teej said, often the comments are more valuable than the link.