Quoting TG member w00dy who summed it up nicely:

XWD is an HTML GENERATOR, not an HTML EDITOR... there's a world of difference.

Using XWD, it's easy enough to mimic the look of more or less any website. As it stands at the moment, XWD is a bit like a Christmas tree, with a bit of forethought, you can hang lots of nice decorations on it like forms, scrollers, movies, etc via placeholders.
► More: http://www.talkgraphics.com/showthread.php?t=36425