I sold a computer to someone once, and had to give her a demonstration on how to use the mouse. She honestly had no clue.
I work in an AIX lab at school. I had to give a 20 minute demo on how to ftp a word file to the PC's from the professor's supercomputer account. The user kept asking me why AIX cannot open Words files. She went on to say that the supercomputer is not very super if it cannot open Word documents. This computer has 112 PowerPC processors and ~30 GB of RAM. Not what you call slow. I can understand that you sometimes have to explain FTP and such to new users, but this girl needed the file for a 600-level computer engineering class. She knew NOTHING about computers outside MS land. If something could not be opened in IE, Office, or Visual Studio, she was clueless. Unfortunately, some proffessors are now MS whores, and discourage the use of *nix systems.