Thanks for the permission to post.
Did you read the rest of the post where I laid out that the NIC, the printer, and multiple monitors failed to work? Using the nv driver by default yields crap results. Yes, I know you can change the driver out, but even having done so, how can I easily get my ancillary monitors to extend my desktop nicely? Windows does it in a few mouse clicks and works very well. I am, of course, completely capable of editing the xorg.conf file myself, because I know how to do such things.. but that isn't really the point is it? The point is that these are things that don't work properly. So, yes, I consider that the inability for either Ubuntu or Debian to easily understand my graphics cards and monitor setup to be a failure in usability.
Don't get me wrong, please. I use Debian at the house for quite a bit, as well as my beloved FreeBSD box, but I recognize the shortcomings in them. To make a blanket statement about the amazing "just works" of desktop linux is just laughable. My Wacom Intuos begs to differ.
Now, to address your anecdotes:
XP was released Aug 24 2001
Vista was released Jan 30 2007
Which you are comparing to:
Fedora Core 11 which has not been released yet according to both:
http://fedoraproject.org/
http://distrowatch.com/table.php?distribution=fedora
So, I am not sure what you are looking for here. It seems rather silly to debate stability and feature sets of operating systems that are at a minumum over 2 years apart, and the benchmark is a distribution that has yet to release.