writes: "Here is a report made by Sun Microsystems people about GNOME usability. They collected a bunch of professionals (lawyers, engineers, Graphic Designers, etc..) and put them in front of a Gnome desktop. They were asked to perform some tasks and tell what some icons, menus, etc., do. Some quotes are really funny, like when they asked what does the terminal emulator icon launch."
Very interesting stuff, and this approach is necessary because once you've gotten accustomed to the system it's no longer possible for you to evaluate how it appears to an inexperienced user.