By having a tl;dr about the actual Wikipedia page, there is no need for the user to click on the link. Following what you're saying, Google as wrapped it in their own layer, and trying to take ad revenue.
Actually, I find that having a tl;dr will rarely answer the question(s) I have on a topic, but it will commonly show me whether I've found the right wikipedia page. I usually either click-through or refine my search.
smoyer|12 years ago