Poor People Use Yahoo, Those Better Off Use Google
techcrunch.com
techcrunch.com
Struggling Societies, Urban Essence, Blue Collar Blackbone,
Varying Lifestyles, Aspiring Contemporaries, Remote America,
Rural Villages and Farms, Metro Fringe, American Diversity,
Upscale America, Small-town Contentment, Affluent Suburbia
OMG? New low in PC? It's like J.Crew colors to explain geographic groups. My curiosity got the best of me and I found this explanation: http://www.tactician.com/support/mosaic_documents.aspAlso, people who rely on Yahoo! Mail end up using those services as a lot of Yahoo! sites require logins, such as Yahoo! Games. Without Yahoo! or MSN Mail, people would eventually stop visiting those portals, as most users trust Google for search results. So that explains why users even visit those portals any more.
As far as Google, one isn't required to have a login, except for things like business/calendar tools, document management, and adsense, as far as I remember. One can clearly notice Google targets wealthier and smarter users. (I'm not saying wealth equals brains--Google simply targets nerds, education, and corporate users while Yahoo is still trying to target everybody at once.)
As for "Google targets wealthier and smarter users", I don't think it's intentional. If you go to any tech talks given by their usability folks, they say they intentionally don't do user personas, precisely because they want to target "everybody". I find it far more likely that they design things that work slightly better for them, and their friends who help them test, who, again, tend to be of similar socioeconomic background.
I think people who are more technologically-inclined are using Gmail. It offers a lot of obvious advantages to a power email user over Yahoo! Mail. I have also noticed that those who are technologically inclined are often slightly more affluent than those who are not, perhaps due to in-demand skillsets causing jumps in pay rates versus other jobs. So maybe the money is sort of a side effect of technological knowledge.
Just my .02.