I remember an article from last year or so that said Google Mail users were far fewer in number than Yahoo! or Hotmail users but were wealthier. This makes sen

I remember an article from last year or so that said Google Mail users were far fewer in number than Yahoo! or Hotmail users but were wealthier. This makes sense as GMail was still relatively new two years ago, and more tech savvy (and higher income) users switched to GMail first. Also, 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.)