Fascinating. I intend to do some research on this, but if you're aware of any methods or protocols to retrain the system for increased motility in absence of fiber, drop a link. I'm pretty sure that an abrupt change would not work well for one adapted to fiber and observe such every time the situation arises. Probiotics and physical activity don't affect this for me.

Edit: I see that the report did pretty much exactly what I say doesn't work. This is confusing when considered through my own experience. Definitely interesting though.