After more than a decade with Windows, I know what to expect from
it -- I expect that it will often break, crash, or otherwise not
work. This is not a myth; show me someone who says that they have
never had a major Windows malfunction and I'll show you someone
who has never upgraded their hardware or software. I expect
Windows to malfunction, so when it does, it's no surprise -- just
more of the same crap from the same crappy operating system.
GNU/Linux, on the other hand, I expect to work unless I use
experimental software; if something goes wrong, more often than
not, it was due to my own mistakes. In general, I think many
people who are moving away from Windows are going to GNU/Linux
with the expectation that it is a software utopia where computer
problems don't exist. That environment will never happen on any
architecture or platform, but GNU/Linux often comes close as long
as you know your way around it. I see people on forums and
mailing lists talk about how "Linux is not ready for the desktop"
because they're embarrassed that they couldn't figure out
something horrifyingly simple, like how to adjust the sound
volume or add Macromedia Flash support to their Web browser --
things that could be solved by reading the available
documentation or searching Google. These same challenges exist on
Windows too, but you expect Windows to malfunction, so it's
acceptable. "Oh that kooky Windows! It's always messing up somehow!"