The various hints I have made along the way may give you the impression that Fedora is not for beginning users, and this is not the case. There are elements of Fedora that are not as polished as other distros, but there is no real roadblock for keeping new users out. But if I were recommending a Linux distro to a new user with little to no computer savvy, Fedora would not be it. If the user was a power user on another platform, however, then Fedora is perfect, because it delivers superior stability and flexibility.
That flexibility shows up in Fedora's "spins," Fedora's delivery system for non-GNOME or specialized-task-based versions of the basic Fedora Desktop release. These spins include KDE, LXDE, XFCE, and a Games version, and having installed and worked with the first three in this list, they are just as fast and stable as the main Fedora. Spins are a nice way to deliver specialized versions of Fedora, and it would be nice to see them take off a bit more (a developer's spin or a graphic designer's spin, for example).
Other than the admittedly small points of concern, there was nothing that leaped out at me and said "avoid this distro at all costs." Given the availability of so many software applications, the speed and stability of the platform, and the capability to customize the heck out of this distribution, I believe Fedora 13 will be a Linux distribution that can perform well for just about any desktop user.