Karl. Here is a line from the first referenced article. Perhaps you missed it.
"After only a year of service, the brake fluid in the average vehicle may contain as much as two percent water. After 18 months, the level of contamination can be as high as three percent. And after several years of service, it is not unusual to find brake fluid that contains as much as seven to eight percent water."
Sounds to me like moisture in brake systems is normal and expected.
I'm sorry for sidetracking this thread, but this is a safety issue first and foremost and when you are piloting an 8 to 10 ton vehicle down the road, having a reliable and fully functioning brake system is the responsible and right thing to do and the cost and trouble to flush the fluid is minimal.
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 1997 Jeep Grand Cherokee "toad"