Not a well written article. When I read things like "brake fluid is hygrosconic" and has a "magnetic attraction for moisture" I get turned off. Here's an article that goes (perhaps a little too much) in depth on this subject:
http://www.babcox.com/editorial/bf/bf50412.htm
The above article points out that water is only partly to blame for brake fluid deterioration. It uncovers some surprising phenomena that'll scare anyone into changing their brake fluid on a regular basis.