I don't recall you saying that but whatever it isn't really important.
sure it is important, because it shows you don't read the posts very thoroughly! :p
[link] (and repeated by Crispy in his post that followed) "...darwin itself is just the core shell-based system- you would have to install a gui on top, like xfree86 for example..."
which means (for example) that you don't get a gui with the OS, like (for example) the MacOSX gui. :p
~Kujila