On 5/13/06, Seun Osewa seun.osewa@gmail.com wrote:
100? Ouch!
Google recognizes keywords in urls that are separated by dots or hyphens, but words separared by underscores are viewed as one unit.
A Google rep even recommended hyphens over underscores: http://www.webmasterworld.com/forum3/23564.htm http://www.webmasterworld.com/forum3/4572.htm
The difference is really small, and if a project gets a lot of link love (like wikipedia) it probably wouldn't matter, I guess.
Two comments.
1) Both of those threads are quite old, and google's algorithms don't stand still.
2) As one of those threads pointed out we are talking about separators in the urls here. Mediawiki turns spaces into underscores in the article urls, but the page content will have the words separated by spaces, and presumably the page content counts more than the url.