I am 5' 1" (on a good day) and have a 2008 xs womens Giant anthem (w). It fits me great. To give you an idea I ride about a size 43-44 cm road bike, and have a hard time finding a tri bike to fit me. There is nothing about me that is "long"- as in "long arms, but short torso, or short torso long legs, or long torso short legs. No I am just short from top to bottom.
Hope this helps.

I am actually thinking about selling my anthem, as I don't ride mtn enough to justify keeping her. If anyone out there is interested, let me know.