Yes, I usually go to Wikipedia, too. And yes, I expect to have to go elsewhere afterwards. I go to Wiki mostly because the articles there are brief (sometimes just to check if something is really called what I think it is called), but I don't search Wiki itself because when I see Google results, I automatically note pages which I should visit after I get the minimal information from Wiki. (Sometimes Wiki articles appear to me to ramble about the topic, especially when it is something etnographic.) So I guess I do agree with you that the s-2-n ratio is good enough. However, sometimes when I have time to kill, I prefer other Google results specifically because Wiki (for me) is kind of a curiosity stopper.

If LW also came up in the first page of a search, I'd go there too, simply because that would be such an improbable occurrence considering what I search for:)