I've always wanted to do a test. Get three groups of people, each with about the same very low-level of computer ability. Each group has a broadband router (DHCP on) and a free ethernet cable sitting there. Give one group a consumer-level Dell with Windows, another Linux (pick a vendor) and another an Apple iMac.
Then sit back and watch who gets set up first, who gets on the 'net , writes some letters, sends some email, and gets hit with any kind of virus first, and of course who takes a sledge hammer to their new box first (have sledge hammer prepositioned next to the desk).
Somehow, I can easily, and with much confidence, predict the winner.