it _is_ world changing for them. it completely restructures their social lives and the opportunities available to them for both serious and non-serious social interaction. facebook has had a larger impact on many people's lives than google. do you think most people really care about somewhat better search results and somewhat better webmail over having access to four times (pulled that number out of my ass, but you can bet that it's a multiplier) as many social events and people as they did before?